Re: [asterisk-users] Echo Cancellation on VoIP networks
Does anyone have any experience with PBXMate and the quality of the software? Does it cancel echo properly? Can someone also give me an price indication of the software? I can’t find it on their website. From: asterisk-users-boun...@lists.digium.com [mailto:asterisk-users-boun...@lists.digium.com] On Behalf Of Valer Nur Sent: Wednesday, August 27, 2014 6:16 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [asterisk-users] Echo Cancellation on VoIP networks If the clients are not doing the echo cancellation properly, you can always use a centralized echo cancellation software for VoIP networks. On Wednesday, August 27, 2014 5:25 PM, Dennis Guse dennis.g...@alumni.tu-berlin.demailto:dennis.g...@alumni.tu-berlin.de wrote: On VoIP echo cancellation is basically: hope that the client is doing AND is doing it well. In the best case each client uses a knowledge about his hardware (microphone, speaker, distance etc.). --- Dennis Guse On Tue, Aug 26, 2014 at 1:30 PM, Emiliano Vazquez emilianovazq...@gmail.commailto:emilianovazq...@gmail.com wrote: El 26/08/14 a las 05:33, Grant Bagdasarian escibió: I’m new to Echo Cancellation and I was wondering how it is handled/works on pure VoIP networks using Asterisk? there is no echo problems on pure VoIP networks. echo is a common problem when you have changes from analog to digital. The only echo problem you will have is when you call another network who has analog circuits with wrong configuration or poor hardware. But you can't solve it. Best regards. -- Emiliano Vazquez | PcCentro Informatica CCTV Office: +54 (11) 4635-3218 y Rotativas Movil: 011-15-6253-7165 Mail: emilianovazq...@gmail.commailto:emilianovazq...@gmail.com Web: http://www.pccentro.com.arhttp://www.pccentro.com.ar/ -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.comhttp://www.api-digital.com/ -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com http://www.api-digital.com/ -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo Cancellation on VoIP networks
On VoIP echo cancellation is basically: hope that the client is doing AND is doing it well. In the best case each client uses a knowledge about his hardware (microphone, speaker, distance etc.). --- Dennis Guse On Tue, Aug 26, 2014 at 1:30 PM, Emiliano Vazquez emilianovazq...@gmail.com wrote: El 26/08/14 a las 05:33, Grant Bagdasarian escibió: I’m new to Echo Cancellation and I was wondering how it is handled/works on pure VoIP networks using Asterisk? there is no echo problems on pure VoIP networks. echo is a common problem when you have changes from analog to digital. The only echo problem you will have is when you call another network who has analog circuits with wrong configuration or poor hardware. But you can't solve it. Best regards. -- Emiliano Vazquez | PcCentro Informatica CCTV Office: +54 (11) 4635-3218 y Rotativas Movil: 011-15-6253-7165 Mail: emilianovazq...@gmail.com Web: http://www.pccentro.com.ar -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo Cancellation on VoIP networks
If the clients are not doing the echo cancellation properly, you can always use a centralized echo cancellation software for VoIP networks. On Wednesday, August 27, 2014 5:25 PM, Dennis Guse dennis.g...@alumni.tu-berlin.de wrote: On VoIP echo cancellation is basically: hope that the client is doing AND is doing it well.In the best case each client uses a knowledge about his hardware (microphone, speaker, distance etc.). --- Dennis Guse On Tue, Aug 26, 2014 at 1:30 PM, Emiliano Vazquez emilianovazq...@gmail.com wrote: El 26/08/14 a las 05:33, Grant Bagdasarian escibió: I’m new to Echo Cancellation and I was wondering how it is handled/works on pure VoIP networks using Asterisk? there is no echo problems on pure VoIP networks. echo is a common problem when you have changes from analog to digital. The only echo problem you will have is when you call another network who has analog circuits with wrong configuration or poor hardware. But you can't solve it. Best regards. -- Emiliano Vazquez | PcCentro Informatica CCTV Office: +54 (11) 4635-3218 y Rotativas Movil: 011-15-6253-7165 Mail: emilianovazq...@gmail.com Web: http://www.pccentro.com.ar -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users-- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo Cancellation on VoIP networks
El 26/08/14 a las 05:33, Grant Bagdasarian escibió: I’m new to Echo Cancellation and I was wondering how it is handled/works on pure VoIP networks using Asterisk? there is no echo problems on pure VoIP networks. echo is a common problem when you have changes from analog to digital. The only echo problem you will have is when you call another network who has analog circuits with wrong configuration or poor hardware. But you can't solve it. Best regards. -- Emiliano Vazquez | PcCentro Informatica CCTV Office: +54 (11) 4635-3218 y Rotativas Movil: 011-15-6253-7165 Mail: emilianovazq...@gmail.com Web: http://www.pccentro.com.ar -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo Cancellation when calling from softphone to mobile.
Put line side echo cancelation chip on ur PRI card. On 25-Jun-2014 10:35 PM, Anurag Rana anuragrana31...@gmail.com wrote: Hi, I am using Twinkle to call mobile phone but there is too much noise on the mobile user's end. Mobile user's voice is echoed back to user. While on twinkle end everything is fine. Using Asterisk 11. Please suggest some way to mitigate the problem. Thanks. -- Anurag Rana http://newbie42.blogspot.in/ On the trampoline of life's experiences, Striving towards a saintly life in the midst of these materialistic turbulences. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo Cancellation when calling from softphone to mobile.
Is there any Software solution? On Wed, Jun 25, 2014 at 11:38 PM, Mitul Limbani mi...@enterux.in wrote: Put line side echo cancelation chip on ur PRI card. On 25-Jun-2014 10:35 PM, Anurag Rana anuragrana31...@gmail.com wrote: Hi, I am using Twinkle to call mobile phone but there is too much noise on the mobile user's end. Mobile user's voice is echoed back to user. While on twinkle end everything is fine. Using Asterisk 11. Please suggest some way to mitigate the problem. Thanks. -- Anurag Rana http://newbie42.blogspot.in/ On the trampoline of life's experiences, Striving towards a saintly life in the midst of these materialistic turbulences. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- Anurag Rana http://newbie42.blogspot.in/ On the trampoline of life's experiences, Striving towards a saintly life in the midst of these materialistic turbulences. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo Cancellation when calling from softphone to mobile.
There are two common types of echo. Accoustic Echo: This is caused by microphone picking up audio from the speaker. This echo cannot generally be removed by echo cancelers. The solution to accoustic echo is to prevent the microphone from picking up audio from the speaker (or handset or earpiece). Line Echo: This is caused by your outgoing audio “reflecting” off the far end of an analog line. This happens in all calls with a 2-wire analog portion, however in analog and digital (aka PRI) the delay in echo is so small we can’t perceive it.VoIP has far larger latencies so we can hear the echo. This type of echo MUST be canceled out before the audio is converted to VoIP. From: asterisk-users-boun...@lists.digium.com [mailto:asterisk-users-boun...@lists.digium.com] On Behalf Of Anurag Rana Sent: Wednesday, June 25, 2014 2:36 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [asterisk-users] Echo Cancellation when calling from softphone to mobile. Is there any Software solution? On Wed, Jun 25, 2014 at 11:38 PM, Mitul Limbani mi...@enterux.inmailto:mi...@enterux.in wrote: Put line side echo cancelation chip on ur PRI card. On 25-Jun-2014 10:35 PM, Anurag Rana anuragrana31...@gmail.commailto:anuragrana31...@gmail.com wrote: Hi, I am using Twinkle to call mobile phone but there is too much noise on the mobile user's end. Mobile user's voice is echoed back to user. While on twinkle end everything is fine. Using Asterisk 11. Please suggest some way to mitigate the problem. Thanks. -- Anurag Rana http://newbie42.blogspot.in/ On the trampoline of life's experiences, Striving towards a saintly life in the midst of these materialistic turbulences. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- Anurag Rana http://newbie42.blogspot.in/ On the trampoline of life's experiences, Striving towards a saintly life in the midst of these materialistic turbulences. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo Cancellation
Shaun Ruffell sruffell at digium.com writes: On Thu, Jul 25, 2013 at 02:51:02AM -0700, bilal ghayyad wrote: Hello; If our Digium Telephony Card does not support echo cancellation like (1TDM410PLF or 1AEX410PLF), what is the best and simple way to overcome the echo? Regards Bilal Also, just FYI, those cards do support adding a hardware echocancelation module. But I would recommend trying the software solutions first. I am new to asterisk and pbxiaf. I have setup a VM and intend to use it for a number of android phones (using sipdroid) all on local wifi for a conference call. There is a lot of echo. I also added a GoogleVoice account, even on a standard phone call the remote party gets a late but large echo. As I understand, DAHDI works with the cards, seeing as my complete system is software based, how would I get rid of the echo. Thanks in advance. Ghanshyam -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo Cancellation
On Tue, Aug 20, 2013 at 3:01 PM, Ghanshyam btcs.em...@gmail.com wrote: Shaun Ruffell sruffell at digium.com writes: On Thu, Jul 25, 2013 at 02:51:02AM -0700, bilal ghayyad wrote: Hello; If our Digium Telephony Card does not support echo cancellation like (1TDM410PLF or 1AEX410PLF), what is the best and simple way to overcome the echo? Regards Bilal Also, just FYI, those cards do support adding a hardware echocancelation module. But I would recommend trying the software solutions first. I am new to asterisk and pbxiaf. I have setup a VM and intend to use it for a number of android phones (using sipdroid) all on local wifi for a conference call. There is a lot of echo. I also added a GoogleVoice account, even on a standard phone call the remote party gets a late but large echo. As I understand, DAHDI works with the cards, seeing as my complete system is software based, how would I get rid of the echo. Thanks in advance. Ghanshyam -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users Unlike our friend Ghanshyam, i'm sorry for the hijack however does OSLEC only work with telephony cards or, will it also work on a purely Asterisk SIP environment? Thanks in Advance, Nick. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo Cancellation
Echo must be canceled where the low latency audio (PSTN) meets high latency audio (VoIP).You can't echo cancel VoIP. -Original Message- From: asterisk-users-boun...@lists.digium.com [mailto:asterisk-users-boun...@lists.digium.com] On Behalf Of Nick Khamis Sent: Tuesday, August 20, 2013 3:42 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [asterisk-users] Echo Cancellation Unlike our friend Ghanshyam, i'm sorry for the hijack however does OSLEC only work with telephony cards or, will it also work on a purely Asterisk SIP environment? -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo Cancellation
Thanks Eric, I breezed through the documentation and got the impression that this was the case. Good luck on getting rid of that echo Bilal! N. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo Cancellation
25.07.2013 13:51, bilal ghayyad пишет: Hello; If our Digium Telephony Card does not support echo cancellation like (1TDM410PLF or 1AEX410PLF), what is the best and simple way to overcome the echo? oslec, imho. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo Cancellation
On 07/25/2013 11:51 AM, bilal ghayyad wrote: Hello; If our Digium Telephony Card does not support echo cancellation like (1TDM410PLF or 1AEX410PLF), what is the best and simple way to overcome the echo? Use the free OSLEC echo canceller software module or Digium's commercial HPEC echo canceller software module. Google is your friend. Regards, Patrick -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo Cancellation
On 7/25/2013 5:57 AM, Patrick Lists wrote: On 07/25/2013 11:51 AM, bilal ghayyad wrote: Hello; If our Digium Telephony Card does not support echo cancellation like (1TDM410PLF or 1AEX410PLF), what is the best and simple way to overcome the echo? Use the free OSLEC echo canceller software module or Digium's commercial HPEC echo canceller software module. Google is your friend. Regards, Patrick +1 for OSLEC JohnM -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo Cancellation
On Thu, Jul 25, 2013 at 02:51:02AM -0700, bilal ghayyad wrote: Hello; If our Digium Telephony Card does not support echo cancellation like (1TDM410PLF or 1AEX410PLF), what is the best and simple way to overcome the echo? Regards Bilal Also, just FYI, those cards do support adding a hardware echocancelation module. But I would recommend trying the software solutions first. -- Shaun Ruffell Digium, Inc. | Linux Kernel Developer 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA Check us out at: www.digium.com www.asterisk.org -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo Cancellation Problem - Invalid Argument?!?
Well, I downgraded this box to Asterisk 1.4.38 and all is well again. Echo cancellation works properly, no problems, no errors. I have to assume this is a bug in Asterisk 1.8.x or Wanpipe 3.5.18. --Tim - Original Message - Greetings folks- I'm experiencing issues with a freshly installed box. When a call comes in via PRI (Sangoma AFT-A104), I see this in my logs: [Dec 15 14:26:10] WARNING[23546] chan_dahdi.c: Unable to enable echo cancellation on channel 12 (Invalid argument) [Dec 15 14:26:10] WARNING[23546] chan_dahdi.c: Unable to enable echo cancellation on channel 8 (Invalid argument) [Dec 15 14:26:10] WARNING[23546] chan_dahdi.c: Unable to enable echo cancellation on channel 10 (Invalid argument) [Dec 15 14:26:10] WARNING[23546] chan_dahdi.c: Unable to enable echo cancellation on channel 9 (Invalid argument) Relevant components: Asterisk: Asterisk SVN-trunk-r290509 built by root @ prigw01 on a i686 running Linux on 2010-11-30 22:12:05 UTC DAHDI: dahdi-linux-complete-2.4.0+2.4.0 LibPRI: libpri-1.4.11.5 Wanpipe: wanpipe-3.5.18 Kernel: Linux prigw01 2.6.32-24-generic #39-Ubuntu SMP Wed Jul 28 06:07:29 UTC 2010 i686 GNU/Linux The card does not have a hardware echo canceler. It should use MG2 as specified in DAHDI's system.conf: #autogenerated by /usr/sbin/wancfg_dahdi do not hand edit #autogenrated on 2010-12-08 #Dahdi Channels Configurations #For detailed Dahdi options, view /etc/dahdi/system.conf.bak loadzone=us defaultzone=us #Sangoma A104 port 1 [slot:2 bus:2 span:1] wanpipe1 span=1,1,0,esf,b8zs bchan=1-23 #dchan=24 echocanceller=mg2,1-23 hardhdlc=24 And, from chan_dahdi.conf: ;Sangoma A104 port 1 [slot:2 bus:2 span:1] wanpipe1 switchtype=national context=ldrouted group=1 echocancel=yes signalling=pri_net channel =1-23 Any thoughts, pointers, suggestions? The echo is horrible, please help me make it stop. :-) -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation on DAHDI
- DHAVAL INDRODIYA dhaval.it01...@gmail.com escreveu: Hi, Carlos I checked dmesg on my server and i found following message what is meaning for this ? i cant understand VPM400: Not Present VPM450: echo cancellation for 128 channels VPM450: hardware DTMF disabled. VPM450: Present and operational servicing 4 span(s) regards Dhaval That means you have a VPM450 echo cancelling module attached to your digital board. All you need to do in order to activate echo cancelling is setting echocancel=yes on your chan_dahdi.conf. After that you can check if the echo canceller is really enabled by triggering a dahdi show channel X on the Asterisk CLI. X should be a channel that's currently on a call. Here's an example: stara*CLI dahdi show channel 64 Channel: 64 File Descriptor: 77 Span: 3LI Extension: Dialing: no Context: pabx Caller ID: Calling TON: 0 Caller ID name: Destroy: 0 InAlarm: 0 Signalling Type: ISDN PRI Radio: 0I Owner: DAHDI/64-1 Real: DAHDI/64-1 Callwait: None Threeway: None Confno: -1 Propagated Conference: -1 Real in conference: 0 DSP: yes Relax DTMF: no Dialing/CallwaitCAS: 0/0 Default law: alaw Fax Handled: no Pulse phone: no Echo Cancellation: 128 taps unless TDM bridged, currently ON PRI Flags: Call PRI Logical Span: Implicit Actual Confinfo: Num/0, Mode/0x Actual Confmute: No Hookstate (FXS only): Onhook Of course, the interesting line to you is the Echo Cancellation one. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation on DAHDI
On Wed, 2010-03-03 at 10:14 +0530, DHAVAL INDRODIYA wrote: Hi, Carlos I checked dmesg on my server and i found following message what is meaning for this ? i cant understand VPM400: Not Present VPM450: echo cancellation for 128 channels VPM450: hardware DTMF disabled. VPM450: Present and operational servicing 4 span(s) Well, that means that your card does have the echo cancellation module installed and it is active. Please post your DAHDI configuration to make sure your channels are properly configured. You should not have echo on any channel but remember that the E1 is not the only source of echo for calls. -- Telecomunicaciones Abiertas de México S.A. de C.V. Carlos Chávez Prats Director de Tecnología +52-55-91169161 ext 2001 signature.asc Description: This is a digitally signed message part -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation on DAHDI
- DHAVAL INDRODIYA dhaval.it01...@gmail.com escreveu: Dear All, How can we know the On board supports echo cancellation I have Digium, Inc. Wildcard TE410P quad-span T1/E1/J1 card 3.3V (rev 02) board all working fine but sometimes i got echo when user are calling a PRI. is there any way to know on board echo cancellation . regards Dhaval Do you have an echo cancelling module attached to that board? If so, all you need is to set echocancel=yes and echocancelwhenbridged=no on your chan_dahdi.conf. If you don't... well you should! Anyway, you can turn on the echocancelling via software with echocancel=256. I strongly recommend using OSLEC in that case. You'll need to patch your DAHDI in order to use it, but it's totally worth it. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation on DAHDI
On Tue, 2010-03-02 at 09:22 -0300, Vinícius Fontes wrote: - DHAVAL INDRODIYA dhaval.it01...@gmail.com escreveu: Dear All, How can we know the On board supports echo cancellation I have Digium, Inc. Wildcard TE410P quad-span T1/E1/J1 card 3.3V (rev 02) board all working fine but sometimes i got echo when user are calling a PRI. is there any way to know on board echo cancellation . regards Dhaval Do you have an echo cancelling module attached to that board? If so, all you need is to set echocancel=yes and echocancelwhenbridged=no on your chan_dahdi.conf. If you don't... well you should! Anyway, you can turn on the echocancelling via software with echocancel=256. I strongly recommend using OSLEC in that case. You'll need to patch your DAHDI in order to use it, but it's totally worth it. On the subject of DAHDI -v- OSLEC. I never had any luck getting it to work with DAHDI 2.2.1 despite following: http://www.rowetel.com/ucasterisk/oslec.html#install_dahdi All I ever go was a bad case of the blues :-( make[3]: *** No rule to make target `/usr/src/dahdi/linux/drivers/dahdi/echo.c', needed by `/usr/src/dahdi/linux/drivers/dahdi/echo.o'. I guess I missed something somewhere??? -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation on DAHDI
- Brian brel.astersik100...@copperproductions.co.uk escreveu: On Tue, 2010-03-02 at 09:22 -0300, Vinícius Fontes wrote: - DHAVAL INDRODIYA dhaval.it01...@gmail.com escreveu: Dear All, How can we know the On board supports echo cancellation I have Digium, Inc. Wildcard TE410P quad-span T1/E1/J1 card 3.3V (rev 02) board all working fine but sometimes i got echo when user are calling a PRI. is there any way to know on board echo cancellation . regards Dhaval Do you have an echo cancelling module attached to that board? If so, all you need is to set echocancel=yes and echocancelwhenbridged=no on your chan_dahdi.conf. If you don't... well you should! Anyway, you can turn on the echocancelling via software with echocancel=256. I strongly recommend using OSLEC in that case. You'll need to patch your DAHDI in order to use it, but it's totally worth it. On the subject of DAHDI -v- OSLEC. I never had any luck getting it to work with DAHDI 2.2.1 despite following: http://www.rowetel.com/ucasterisk/oslec.html#install_dahdi All I ever go was a bad case of the blues :-( make[3]: *** No rule to make target `/usr/src/dahdi/linux/drivers/dahdi/echo.c', needed by `/usr/src/dahdi/linux/drivers/dahdi/echo.o'. I guess I missed something somewhere??? Get the most recent version of Linux 2.6 kernel. Inside you'll find a directory named staging/echo. Copy that entire directory to the drivers/linux directory of the DAHDI sources. In the end you gotta have a directory named linux/drivers/staging/echo inside your DAHDI sources. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation on DAHDI
On Tue, 2010-03-02 at 12:45 -0300, Vinícius Fontes wrote: - Brian brel.astersik100...@copperproductions.co.uk escreveu: On Tue, 2010-03-02 at 09:22 -0300, Vinícius Fontes wrote: - DHAVAL INDRODIYA dhaval.it01...@gmail.com escreveu: Dear All, How can we know the On board supports echo cancellation I have Digium, Inc. Wildcard TE410P quad-span T1/E1/J1 card 3.3V (rev 02) board all working fine but sometimes i got echo when user are calling a PRI. is there any way to know on board echo cancellation . regards Dhaval Do you have an echo cancelling module attached to that board? If so, all you need is to set echocancel=yes and echocancelwhenbridged=no on your chan_dahdi.conf. If you don't... well you should! Anyway, you can turn on the echocancelling via software with echocancel=256. I strongly recommend using OSLEC in that case. You'll need to patch your DAHDI in order to use it, but it's totally worth it. On the subject of DAHDI -v- OSLEC. I never had any luck getting it to work with DAHDI 2.2.1 despite following: http://www.rowetel.com/ucasterisk/oslec.html#install_dahdi All I ever go was a bad case of the blues :-( make[3]: *** No rule to make target `/usr/src/dahdi/linux/drivers/dahdi/echo.c', needed by `/usr/src/dahdi/linux/drivers/dahdi/echo.o'. I guess I missed something somewhere??? Get the most recent version of Linux 2.6 kernel. Inside you'll find a directory named staging/echo. Copy that entire directory to the drivers/linux directory of the DAHDI sources. In the end you gotta have a directory named linux/drivers/staging/echo inside your DAHDI sources. I already have those :-( ls -alh /usr/src/dahdi/dahdi/linux/drivers/staging/echo drwxr-xr-x 2 root root 4.0K 2010-03-02 14:04 . drwxr-xr-x 3 root root 4.0K 2010-03-02 14:04 .. -rw-r--r-- 1 root root 5.7K 2010-03-02 14:04 bit_operations.h -rw-r--r-- 1 root root 20K 2010-03-02 14:04 echo.c -rw-r--r-- 1 root root 7.2K 2010-03-02 14:04 echo.h -rw-r--r-- 1 root root 7.4K 2010-03-02 14:04 fir.h -rw-r--r-- 1 root root 251 2010-03-02 14:04 Kconfig -rw-r--r-- 1 root root 29 2010-03-02 14:04 Makefile -rw-r--r-- 1 root root 14K 2010-03-02 14:04 mmx.h -rw-r--r-- 1 root root 2.8K 2010-03-02 14:04 oslec.h -rw-r--r-- 1 root root 367 2010-03-02 14:04 TODO To be sure I copied them again... cp -rf /usr/src/dahdi/linux-2.6.28/drivers/staging/echo/* /usr/src/dahdi/dahdi/linux/drivers/staging/echo (the /dahdi/dahdi is not a typo...) But still no dice :-( /usr/src/dahdi/dahdi# make make -C linux all make[1]: Entering directory `/usr/src/dahdi/dahdi/linux' make -C drivers/dahdi/firmware firmware-loaders make[2]: Entering directory `/usr/src/dahdi/dahdi/linux/drivers/dahdi/firmware' make[2]: Leaving directory `/usr/src/dahdi/dahdi/linux/drivers/dahdi/firmware' make -C /lib/modules/2.6.27-7-server/build SUBDIRS=/usr/src/dahdi/dahdi/linux/drivers/dahdi DAHDI_INCLUDE=/usr/src/dahdi/dahdi/linux/include DAHDI_MODULES_EXTRA= HOTPLUG_FIRMWARE=yes modules DAHDI_BUILD_ALL=m make[2]: Entering directory `/usr/src/linux-headers-2.6.27-7-server' make[3]: *** No rule to make target `/usr/src/dahdi/dahdi/linux/drivers/dahdi/echo.c', needed by `/usr/src/dahdi/dahdi/linux/drivers/dahdi/echo.o'. Stop. make[2]: *** [_module_/usr/src/dahdi/dahdi/linux/drivers/dahdi] Error 2 make[2]: Leaving directory `/usr/src/linux-headers-2.6.27-7-server' make[1]: *** [modules] Error 2 make[1]: Leaving directory `/usr/src/dahdi/dahdi/linux' make: *** [all] Error 2 It would be nice to resolve this - but it's probably beyond my understanding and ability. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation on DAHDI
On Tue, 2 Mar 2010, Brian wrote: It would be nice to resolve this - but it's probably beyond my understanding and ability. Did you un-comment the 2 lines in Kbuild in the ...linux/drivers/dahdi directory? Gordon -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation on DAHDI
On Tue, 2010-03-02 at 15:59 +, Brian wrote: On Tue, 2010-03-02 at 12:45 -0300, Vinícius Fontes wrote: - Brian brel.astersik100...@copperproductions.co.uk escreveu: On Tue, 2010-03-02 at 09:22 -0300, Vinícius Fontes wrote: - DHAVAL INDRODIYA dhaval.it01...@gmail.com escreveu: Dear All, How can we know the On board supports echo cancellation I have Digium, Inc. Wildcard TE410P quad-span T1/E1/J1 card 3.3V (rev 02) board all working fine but sometimes i got echo when user are calling a PRI. is there any way to know on board echo cancellation . regards Dhaval Do you have an echo cancelling module attached to that board? If so, all you need is to set echocancel=yes and echocancelwhenbridged=no on your chan_dahdi.conf. If you don't... well you should! Anyway, you can turn on the echocancelling via software with echocancel=256. I strongly recommend using OSLEC in that case. You'll need to patch your DAHDI in order to use it, but it's totally worth it. On the subject of DAHDI -v- OSLEC. I never had any luck getting it to work with DAHDI 2.2.1 despite following: http://www.rowetel.com/ucasterisk/oslec.html#install_dahdi All I ever go was a bad case of the blues :-( make[3]: *** No rule to make target `/usr/src/dahdi/linux/drivers/dahdi/echo.c', needed by `/usr/src/dahdi/linux/drivers/dahdi/echo.o'. I guess I missed something somewhere??? Get the most recent version of Linux 2.6 kernel. Inside you'll find a directory named staging/echo. Copy that entire directory to the drivers/linux directory of the DAHDI sources. In the end you gotta have a directory named linux/drivers/staging/echo inside your DAHDI sources. I already have those :-( ls -alh /usr/src/dahdi/dahdi/linux/drivers/staging/echo drwxr-xr-x 2 root root 4.0K 2010-03-02 14:04 . drwxr-xr-x 3 root root 4.0K 2010-03-02 14:04 .. -rw-r--r-- 1 root root 5.7K 2010-03-02 14:04 bit_operations.h -rw-r--r-- 1 root root 20K 2010-03-02 14:04 echo.c -rw-r--r-- 1 root root 7.2K 2010-03-02 14:04 echo.h -rw-r--r-- 1 root root 7.4K 2010-03-02 14:04 fir.h -rw-r--r-- 1 root root 251 2010-03-02 14:04 Kconfig -rw-r--r-- 1 root root 29 2010-03-02 14:04 Makefile -rw-r--r-- 1 root root 14K 2010-03-02 14:04 mmx.h -rw-r--r-- 1 root root 2.8K 2010-03-02 14:04 oslec.h -rw-r--r-- 1 root root 367 2010-03-02 14:04 TODO To be sure I copied them again... cp -rf /usr/src/dahdi/linux-2.6.28/drivers/staging/echo/* /usr/src/dahdi/dahdi/linux/drivers/staging/echo (the /dahdi/dahdi is not a typo...) But still no dice :-( /usr/src/dahdi/dahdi# make make -C linux all make[1]: Entering directory `/usr/src/dahdi/dahdi/linux' make -C drivers/dahdi/firmware firmware-loaders make[2]: Entering directory `/usr/src/dahdi/dahdi/linux/drivers/dahdi/firmware' make[2]: Leaving directory `/usr/src/dahdi/dahdi/linux/drivers/dahdi/firmware' make -C /lib/modules/2.6.27-7-server/build SUBDIRS=/usr/src/dahdi/dahdi/linux/drivers/dahdi DAHDI_INCLUDE=/usr/src/dahdi/dahdi/linux/include DAHDI_MODULES_EXTRA= HOTPLUG_FIRMWARE=yes modules DAHDI_BUILD_ALL=m make[2]: Entering directory `/usr/src/linux-headers-2.6.27-7-server' make[3]: *** No rule to make target `/usr/src/dahdi/dahdi/linux/drivers/dahdi/echo.c', needed by `/usr/src/dahdi/dahdi/linux/drivers/dahdi/echo.o'. Stop. make[2]: *** [_module_/usr/src/dahdi/dahdi/linux/drivers/dahdi] Error 2 make[2]: Leaving directory `/usr/src/linux-headers-2.6.27-7-server' make[1]: *** [modules] Error 2 make[1]: Leaving directory `/usr/src/dahdi/dahdi/linux' make: *** [all] Error 2 It would be nice to resolve this - but it's probably beyond my understanding and ability. Actually - looking at that make[3]: *** No rule to make target `/usr/src/dahdi/dahdi/linux/drivers/dahdi/echo.c', needed by `/usr/src/dahdi/dahdi/linux/drivers/dahdi/echo.o'. Stop. There is no echo.c in /usr/src/dahdi/dahdi/linux/drivers/dahdi/ - That file is in /usr/src/dahdi/dahdi/linux/drivers/staging/echo/ I've followed this with care: http://www.rowetel.com/ucasterisk/oslec.html#install_dahdi So I'm stumped... -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation on DAHDI
On Tue, 2010-03-02 at 16:27 +, Gordon Henderson wrote: On Tue, 2 Mar 2010, Brian wrote: It would be nice to resolve this - but it's probably beyond my understanding and ability. Did you un-comment the 2 lines in Kbuild in the ...linux/drivers/dahdi directory? Gordon Ah Gordon! Thank God you are here! No my friend, I did not. I was blindly following this http://www.rowetel.com/ucasterisk/oslec.html#install_dahdi But looking at Kbuild all it has in it is... FILE CONTENTS obj-m += echo.o /FILE CONTENTS So I don't have two lines to uncomment ??? Methinks something ain't right here. Colombo would be proud of me. It appears there are issues with make -v- the path of echo.c + echo.o from my limited comprehension of such matters. Perhaps I'll whirl it again, this time unpacking to /usr/src/dahdi rather than /usr/src/dahdi/dahdi. I had adjusted the paths but just in case.. .. .. .. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation on DAHDI
On Tue, 2010-03-02 at 15:44 +0530, DHAVAL INDRODIYA wrote: Dear All, How can we know the On board supports echo cancellation I have Digium, Inc. Wildcard TE410P quad-span T1/E1/J1 card 3.3V (rev 02) board all working fine but sometimes i got echo when user are calling a PRI. is there any way to know on board echo cancellation . Check dmesg on your system for messages like: VPM400: Support Enabled/Disabled VPM450: Support Enabled/Disabled That should tell you if the hardware echo cancellation is working or not. The TE410P does not have hardware echo cancellation the model was TE411P. If you can open the server you should be able to see if the card has a daughter board installed which is the echo module. regards Dhaval -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- Telecomunicaciones Abiertas de México S.A. de C.V. Carlos Chávez Prats Director de Tecnología +52-55-91169161 ext 2001 signature.asc Description: This is a digitally signed message part -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation on DAHDI
On Tue, 2010-03-02 at 16:49 +, Brian wrote: On Tue, 2010-03-02 at 16:27 +, Gordon Henderson wrote: On Tue, 2 Mar 2010, Brian wrote: It would be nice to resolve this - but it's probably beyond my understanding and ability. Did you un-comment the 2 lines in Kbuild in the ...linux/drivers/dahdi directory? Gordon Ah Gordon! Thank God you are here! No my friend, I did not. I was blindly following this http://www.rowetel.com/ucasterisk/oslec.html#install_dahdi But looking at Kbuild all it has in it is... FILE CONTENTS obj-m += echo.o /FILE CONTENTS So I don't have two lines to uncomment ??? Methinks something ain't right here. Colombo would be proud of me. It appears there are issues with make -v- the path of echo.c + echo.o from my limited comprehension of such matters. Perhaps I'll whirl it again, this time unpacking to /usr/src/dahdi rather than /usr/src/dahdi/dahdi. I had adjusted the paths but just in case.. .. .. .. My issue was nothing more complex than having downloaded the full dahdi package. The result is it unpacks to: /usr/src/dahdi/linux/drivers/staging - not /usr/src/dahdi/drivers/staging. Fix was nothing more simple than moving the contents of /usr/src/dahdi/linux/ to /usr/src/dahdi/ and the 'howto' worked pretty much like a charm :-) -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation on DAHDI
Hi, Carlos I checked dmesg on my server and i found following message what is meaning for this ? i cant understand VPM400: Not Present VPM450: echo cancellation for 128 channels VPM450: hardware DTMF disabled. VPM450: Present and operational servicing 4 span(s) regards Dhaval On Tue, Mar 2, 2010 at 10:25 PM, Carlos Chavez cur...@telecomabmex.comwrote: On Tue, 2010-03-02 at 15:44 +0530, DHAVAL INDRODIYA wrote: Dear All, How can we know the On board supports echo cancellation I have Digium, Inc. Wildcard TE410P quad-span T1/E1/J1 card 3.3V (rev 02) board all working fine but sometimes i got echo when user are calling a PRI. is there any way to know on board echo cancellation . Check dmesg on your system for messages like: VPM400: Support Enabled/Disabled VPM450: Support Enabled/Disabled That should tell you if the hardware echo cancellation is working or not. The TE410P does not have hardware echo cancellation the model was TE411P. If you can open the server you should be able to see if the card has a daughter board installed which is the echo module. regards Dhaval -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- Telecomunicaciones Abiertas de México S.A. de C.V. Carlos Chávez Prats Director de Tecnología +52-55-91169161 ext 2001 -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation in a sip channel
Problem solved. :) I was adding to the pstn line a gain of 6 DB for both sides. It has to be less than zero. After that the echo almost disappeared. 2010/1/21 Alexandre Rodrigues alex...@gmail.com Hello all, I have a Linksys spa3102 with one FXS and one FXO port. The problem is that I have a lot of echo when using the fxo port, the sound is of very low quality. So, since I am passing from a FXO port to a SIP channel I ask: is there any Sip echo canceler software for asterisk?? Thanks in advance. Alex -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] echo cancellation for sip phones
Pezhman Lali wrote: Dear, the sip phones that registered, in to the asterisk 1.4.x have the echo in their callings to pstn. how this echo can be canceled? H - you don't give much to go on... What is the connection to the PSTN (i.e. what kind of card, interface etc...) The echo is almost certainly coming from that area rather than the SIP phones themselves. If you have an analogue PSTN card without h/w echo cancellation, I would suggest trying the OSLEC echo canceller. This is[was?] not installed by default with the zaptel drivers. HTH Alan ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] echo cancellation for sip phones
thanks for your writing the network is like behind: Sip phone(caller)---SERAsterisk world telephone carrier---pstn--callee the carriers and their routers are not accessible for us , the callees have not any echo in their callings but the caller(sip phones) has the echo. there isn't any telephone cards on our servers(SER and Asterisk) , all of calls are come from or going out , on internet connections --- On Thu, 11/20/08, Alan Lord [EMAIL PROTECTED] wrote: From: Alan Lord [EMAIL PROTECTED] Subject: Re: [asterisk-users] echo cancellation for sip phones To: asterisk-users@lists.digium.com Date: Thursday, November 20, 2008, 12:01 PM Pezhman Lali wrote: Dear, the sip phones that registered, in to the asterisk 1.4.x have the echo in their callings to pstn. how this echo can be canceled? H - you don't give much to go on... What is the connection to the PSTN (i.e. what kind of card, interface etc...) The echo is almost certainly coming from that area rather than the SIP phones themselves. If you have an analogue PSTN card without h/w echo cancellation, I would suggest trying the OSLEC echo canceller. This is[was?] not installed by default with the zaptel drivers. HTH Alan ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation and DTMF from the Asterisk console?
Nikhil Nair wrote: I gather Asterisk can do very good software echo cancellation, but I can see no reference to using it with chan_console (using the Alsa driver). Am I overlooking something obvious, or is that really not implemented? IIRC, echo cancellation is fully in zaptel. If your remote callers will be SIP or IAX based, it probably won't be effective. In addition, I've tried using 'dial' from the Asterisk console while a call from the console is already established, hoping that this would send DTMF signals. So far those signals haven't been received at the other end, while I've had no trouble sending DTMF from a Windows softphone via the same Asterisk box. I don't follow this. My asterisk (1.4.4) does not have a dial command at the console, what are you trying? I'm suspecting that if you have something called Dial that it's for originating NEW calls rather than sending DTMF down existing channels. If all this isn't promising, is there a better way to combine a line out socket, a mic in socket and either software or hardware acoustic echo cancellation? I'm not very familiar with the hardware options around for Asterisk, but it strikes me that this would be a fairly obvious thing to do I haven't come across a hardware speakerphone which allows you to replace its own speaker and mic with line out and mic in sockets, but if there is such a thing, I suppose that connecting it to an FXS socket might be a sensible way forward. It seems there would be fairly directional desk microphones you could find that you could direct at the user. Maybe a little cylinder of paper around the end of the mic would help. Or maybe the speakers can be turned down to the point where they aren't picked up by the mic as strongly, especially after reducing the mic's level as far as you can. I'm thinking with a little cylinder of paper, you could drop the mic level pretty far and it would still pick up the user's voice. Another idea I've considered is wireless headphones... have you considered chan_mobile with bluetooth wireless headset? but that probably goes against the grain of a speakerphone ;) Any help much appreciated! Best wishes, Nikhil. You might consider the oslec echo canceller. I have no idea where it integrates into the call flow, there's potential there, but I suspect it's zaptel-related too. Good luck! Moj ___ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation and DTMF from the Asterisk console?
Nikhil Nair wrote: In addition, I've tried using 'dial' from the Asterisk console while a call from the console is already established, hoping that this would send DTMF signals. So far those signals haven't been received at the other end, while I've had no trouble sending DTMF from a Windows softphone via the same Asterisk box. I see, dial is part of using chan_console, I didn't realize ;) Moj ___ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation and DTMF from the Asterisk console?
In my other response to this topic I mentioned chan_mobile, I could have meant chan_bluetooth. ___ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation and DTMF from the Asterisk console?
Nikhil Nair wrote: Hi, I'd like to try using a good quality microphone and a set of PC speakers (in the first instance) to create a powerful speakerphone; if I get that working, I'll probably try more elaborate audio equipment. Interesting... After playing with - and being very impressed by the OSLEC Echo canceller - my business partner and I had an idea about using it as a module that could be plugged into ALSA (The Linux Sound Architecture) so it could be used with various audio devices. It is just a pipe dream at this moment however. The biggest issue I can see is the delays. OSLEC and the other echo cancellers in Zaptel are Line Echo Cancellers and as such deal with with very short delays. Acoustic echo Cancellation needs to handle far longer delays potentially... I use the Polycom Communicator C100s desktop speaker/mic on Linux, and despite the fact that Polycom integrate most of their EC software in the Windows Driver, it works very well with the OSLEC canceller on the line side. Take a look at the OSLEC package (http://www.rowetel.com/ucasterisk/oslec.html) and maybe try and get in touch with David Rowe - he is very approachable and very knowledgeable on this subject. HTH Alan -- The way out is open! http://www.theopensourcerer.com ___ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Echo cancellation and DTMF from the Asterisk console?
Hi Alan, Thanks for these helpful comments. I had a look at David Rowe's site, and found it very interesting - I'm blind myself, and the Louder router project he's working on sounds like a wonderful idea. It looks like I got my wires crossed, to some extent - I hadn't realised that all the echo cancellation within Asterisk is line rather than acoustic. While I'm new to all this, I believe it's acoustic echo cancellation I need, so it looks like I'll need to take a look at the Speex AEC implementation, and maybe get hold of version 1.2beta2 (which has significant improvements, apparently). Maybe Linphone running on the same box as Asterisk will be the solution, after all. That is, if Linphonec will consent to run for me without giving all sorts of errors and segfaulting... and I thought this release of Debian was supposed to be stable! ;) Ah well. Cheers, Nikhil. On Tue, 4 Dec 2007, Alan Lord wrote: Nikhil Nair wrote: Hi, I'd like to try using a good quality microphone and a set of PC speakers (in the first instance) to create a powerful speakerphone; if I get that working, I'll probably try more elaborate audio equipment. Interesting... After playing with - and being very impressed by the OSLEC Echo canceller - my business partner and I had an idea about using it as a module that could be plugged into ALSA (The Linux Sound Architecture) so it could be used with various audio devices. It is just a pipe dream at this moment however. The biggest issue I can see is the delays. OSLEC and the other echo cancellers in Zaptel are Line Echo Cancellers and as such deal with with very short delays. Acoustic echo Cancellation needs to handle far longer delays potentially... I use the Polycom Communicator C100s desktop speaker/mic on Linux, and despite the fact that Polycom integrate most of their EC software in the Windows Driver, it works very well with the OSLEC canceller on the line side. Take a look at the OSLEC package (http://www.rowetel.com/ucasterisk/oslec.html) and maybe try and get in touch with David Rowe - he is very approachable and very knowledgeable on this subject. HTH Alan -- The way out is open! http://www.theopensourcerer.com ___ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] echo cancellation and ztdummy
http://www.voip-info.org/wiki/view/Causes+of+Echo Rob Townley wrote: Please tell me what hybrid echo is? Where does it come from? Does it have something to do with analog vs T1 trunk lines? On 4/23/07, William Moore [EMAIL PROTECTED] wrote: On 4/23/07, Patrick Fortin [EMAIL PROTECTED] wrote: Are echo cancellation parameters useful when using the ztdummy driver and no physical card ? No. The echocan software and hardware only cancel hybrid echo. They do not cancel acoustic echo that would be generated by voip phones with bad speakerphones or bad headsets. ___ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] echo cancellation and ztdummy
On 4/23/07, Patrick Fortin [EMAIL PROTECTED] wrote: Are echo cancellation parameters useful when using the ztdummy driver and no physical card ? No. The echocan software and hardware only cancel hybrid echo. They do not cancel acoustic echo that would be generated by voip phones with bad speakerphones or bad headsets. ___ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] echo cancellation and ztdummy
Please tell me what hybrid echo is? Where does it come from? Does it have something to do with analog vs T1 trunk lines? On 4/23/07, William Moore [EMAIL PROTECTED] wrote: On 4/23/07, Patrick Fortin [EMAIL PROTECTED] wrote: Are echo cancellation parameters useful when using the ztdummy driver and no physical card ? No. The echocan software and hardware only cancel hybrid echo. They do not cancel acoustic echo that would be generated by voip phones with bad speakerphones or bad headsets. ___ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] ECHO Cancellation in SIP Calls
On Thu, 2006-10-26 at 12:18 +0200, Stefan Agethen wrote: Hi, i am from Germany, so excuse my School English. I use Asteriks 1.2.12.1, zaptel 1.2.9 and mISDN Rc25 - since my update of Asterisk 2 wooks ago, Echos accure in my SIP Calls. I use SNOM 360, sometimes there is no echo (for example if i call myself via SIP-Asterisk-SIPProvider-TELEKOM-ISDN) but if i call other people there occures Echo many times. The Routing is always the same : SIP (SNOM) - Asterisk - VoIPProvider - ISDN/POTS Can i control the cancellation with the zapata.conf ? The snom phones are pretty decent devices and shouldn't introduce echo. Your latency might be too high between asterisk + voipprovider introducing a delay that is noticed as echo. You are hearing the echo that is introduced on the callers side. As I understand it, when you are calling someone there is no zap involved and thus you can't cancel it with zapata.conf. if you look at voip-info.org [1] you'll find a good explanation why you can't use an echo canceller to cancel that sort of echo. So, check the path between you and the voipprovider, e.g. connection saturation, ping times etc (This is assuming you have a proper lan connection between asterisk/snom) Conrad [1] http://www.voip-info.org/wiki/index.php?page=Asterisk+Echo +Cancellation ___ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] ECHO Cancellation in SIP Calls
On Thu, Oct 26, 2006 at 12:18:20PM +0200, Stefan Agethen wrote: Hi, i am from Germany, so excuse my School English. I use Asteriks 1.2.12.1, zaptel 1.2.9 and mISDN Rc25 - since my update of Asterisk 2 wooks ago, Echos accure in my SIP Calls. I use SNOM 360, sometimes there is no echo (for example if i call myself via SIP-Asterisk-SIPProvider-TELEKOM-ISDN) but if i call other people there occures Echo many times. The Routing is always the same : SIP (SNOM) - Asterisk - VoIPProvider - ISDN/POTS Can i control the cancellation with the zapata.conf ? Sure, but only for Zaptel channels. Not for mISDN channels. If you use ZapBRI, this would be the place to configure echo cancelling. -- Tzafrir Cohen icq#16849755jabber:[EMAIL PROTECTED] +972-50-7952406 mailto:[EMAIL PROTECTED] http://www.xorcom.com iax:[EMAIL PROTECTED]/tzafrir ___ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] ECHO Cancellation in SIP Calls
I use SNOM 360, sometimes there is no echo (for example if i call myself via SIP-Asterisk-SIPProvider-TELEKOM-ISDN) but if i call other people there occures Echo many times. The Routing is always the same : SIP (SNOM) - Asterisk - VoIPProvider - ISDN/POTS Can i control the cancellation with the zapata.conf ? Sure, but only for Zaptel channels. Not for mISDN channels. If you use ZapBRI, this would be the place to configure echo cancelling. The important bit is: I use SNOM 360, sometimes there is no echo (for example if i call myself via SIP-Asterisk-SIPProvider-TELEKOM-ISDN) but if i call other people[...] If *he* calls other people he's not going to use zap or misdn, as far as he is concerned it is SIP all the way. (the voip provider puts it into pots) Conrad ___ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] ECHO Cancellation in SIP Calls
Hi, i am from Germany, so excuse my School English. I use Asteriks 1.2.12.1, zaptel 1.2.9 and mISDN Rc25 - since my update of Asterisk 2 wooks ago, Echos accure in my SIP Calls. I use SNOM 360, sometimes there is no echo (for example if i call myself via SIP-Asterisk-SIPProvider-TELEKOM-ISDN) but if i call other people there occures Echo many times. The Routing is always the same : SIP (SNOM) - Asterisk - VoIPProvider - ISDN/POTS Can i control the cancellation with the zapata.conf ? The snom phones are pretty decent devices and shouldn't introduce echo. Your latency might be too high between asterisk + voipprovider introducing a delay that is noticed as echo. You are hearing the echo that is introduced on the callers side. As I understand it, when you are calling someone there is no zap involved and thus you can't cancel it with zapata.conf. if you look at voip-info.org [1] you'll find a good explanation why you can't use an echo canceller to cancel that sort of echo. So, check the path between you and the voipprovider, e.g. connection saturation, ping times etc (This is assuming you have a proper lan connection between asterisk/snom) Conrad [1] http://www.voip-info.org/wiki/index.php?page=Asterisk+Echo +Cancellation Hi Conrad, thanks for your help, this is the way i understand it all the time, a year ago i have optimized my Business Lan for VoIP and there is no loss or lag anymore, the Provider seems to be okay, i have pinged him for one day with MTR, no great loss or high ping. Some days ago i have read a Thread about EC-Cancellation in SIP Calls with the zapata.conf and never understood how this could work, thats the beginning of my question ;) In my case, there is no Zap, you are right. So i must start at the beginning and search for a lag... The EC started two or weeks ago after one year of great communication, in this time i updated Asterisk from 1.2.10 to 1.2.12.1 and zaptel from 1.2.7 to 1.2.9 ... I will watch the Quality and the latency next timeThx for your time ! Stefan ___ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo Cancellation
Hi, Douglas Garstang wrote: If you install a Digium card in an Asterisk system, and install zaptel drivers, do this give any benefit of echo cancellation? Our PSTN gateway is a separate Audiocodes box, so the zaptel card wouldn't actually be connected to anything. I'm wondering though doing this would help, in general, with echo cancellation. No, if your telco lines are not connected to the zaptel card, the zaptel driver and echocancellers will not help you one bit. Best regards, Florian ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo Cancellation
Douglas Garstang a écrit : General question. If you install a Digium card in an Asterisk system, and install zaptel drivers, do this give any benefit of echo cancellation? Our PSTN gateway is a separate Audiocodes box, so the zaptel card wouldn't actually be connected to anything. I'm wondering though doing this would help, in general, with echo cancellation. a) No it won't unless you connect it to a TDM circuit b) I have an audiocodes too (mediant 2000 4E1), and I've found the echo cancellation to be superb. I'm surprised to see you're having issues! Cheers, Jean-Michel. -- Jean-Michel Hiver - http://ykoz.net/ Découvrez la Réunion des Technologies IP Telecom TEL: +262 (0)262 55 03 98 - RCS 434 273 330 SAINT PIERRE ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo Cancellation
Douglas Garstang wrote: General question. If you install a Digium card in an Asterisk system, and install zaptel drivers, do this give any benefit of echo cancellation? Our PSTN gateway is a separate Audiocodes box, so the zaptel card wouldn't actually be connected to anything. I'm wondering though doing this would help, in general, with echo cancellation. I wouldn't think so, since the echo cancellation settings are in zaptel-land. So the call path would have to go through a zap channel before the echo canceller can work. Flynn ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Echo Cancellation
-Original Message- From: Jean-Michel Hiver [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 28, 2006 4:27 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Echo Cancellation Douglas Garstang a écrit : General question. If you install a Digium card in an Asterisk system, and install zaptel drivers, do this give any benefit of echo cancellation? Our PSTN gateway is a separate Audiocodes box, so the zaptel card wouldn't actually be connected to anything. I'm wondering though doing this would help, in general, with echo cancellation. a) No it won't unless you connect it to a TDM circuit b) I have an audiocodes too (mediant 2000 4E1), and I've found the echo cancellation to be superb. I'm surprised to see you're having issues! Me too, given we're on fiber gigabit ethernet, with only a few test calls in progress! ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo Cancellation
a) No it won't unless you connect it to a TDM circuit b) I have an audiocodes too (mediant 2000 4E1), and I've found the echo cancellation to be superb. I'm surprised to see you're having issues! Me too, given we're on fiber gigabit ethernet, with only a few test calls in progress! It's strange. I'm on 100 Mbps network with tens of thoushands of minutes per day. Pehaps it needs to warm up - or maybe your network is just too good :) More seriously, since this hardware is carrier grade (translate: quite expensive), if I was you I would contact / enquire audiocodes about it. There is probably an option that isn't set somewhere. Cheers, Jean-Michel. -- Jean-Michel Hiver - http://ykoz.net/ Découvrez la Réunion des Technologies IP Telecom TEL: +262 (0)262 55 03 98 - RCS 434 273 330 SAINT PIERRE ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation problem
Avi Miller ha scritto: Giuseppe wrote: Can anybody tell me if there is some error or something missing in this configuration please? I have the same card in a few of my servers and the echo canceller works just fine. I'm not 100% sure, but something does jump out at me: Mar 31 16:40:21 WARNING[29878]: chan_capi.c:3334 show_capi_conf_error: ISDN3: conf_error 0x300b PLCI=0x103 I guess you have to set the old echo facility number in your capi.conf Sergio ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation problem
Giuseppe wrote: Can anybody tell me if there is some error or something missing in this configuration please? I have the same card in a few of my servers and the echo canceller works just fine. I'm not 100% sure, but something does jump out at me: == ISDN3: Answering for 'x' -- Playing 'wsa_benvenuto_lib_uni' (language 'it') This plays *before* the echo canceller starts. If you suppress this, does the echo can get a chance to setup successfully? Mar 31 16:40:21 WARNING[30181]: file.c:1029 ast_waitstream: Unexpected control subclass '14' == ISDN3: Setting up echo canceller (PLCI=0x103, function=1, options=4, tail=64) == ISDN3: Setting up DTMF detector (PLCI=0x103, flag=1) -- ISDN3: Error setting up echo canceller (PLCI=0x103) Mar 31 16:40:21 WARNING[29878]: chan_capi.c:3334 show_capi_conf_error: ISDN3: conf_error 0x300b PLCI=0x103 Command=FACILITY_CONF,0x8497 CAPI INFO 0x300b: Facility not supported cYa, Avi -- National Manager - Special Projects Melbourne / Sydney / Canberra / Hobart / London / 2/340 Gore StreetT: +61 (0) 3 9486 0411 Fitzroy, VIC F: +61 (0) 3 9486 0611 3065 W: http://www.squiz.net/ . Open Source - Own it - Squiz.net ./ ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE : [Asterisk-Users] Echo cancellation
Hi, zap show channel 5 To see channel 5 specs, and take a look at Echo Cancellation: 128 taps unless TDM bridged, currently OFF during calls, you must have ON. If you have hardware echocan module, as for TDM2400E, you must also read DSP: yes if this module is active. Best Regards, Francois BERGERET, France. -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Giordano Grandis Envoyé : mardi 28 mars 2006 16:54 À : Asterisk Users Mailing List - Non-Commercial Discussion Objet : R: [Asterisk-Users] Echo cancellation Ok, but is there a way to check if echo cancellation is active on a call in progress ? Thanks Giordano -Messaggio originale- Da: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Per conto di Steve Davies Inviato: martedì 28 marzo 2006 16.43 A: Asterisk Users Mailing List - Non-Commercial Discussion Oggetto: Re: [Asterisk-Users] Echo cancellation On 3/28/06, Giordano Grandis [EMAIL PROTECTED] wrote: Hi all, I'm using bristuff 0.2.0 RC8o with a HFC pci card and on several calls I saw that the echo cancellation is on OFF Echo Cancellation: 0 taps, currently OFF (the result of zap show channel 1-1 for example) Echo cancelling is only enabled if there is a call in progress. Cheers, Steve ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
R: RE : [Asterisk-Users] Echo cancellation
Hi Francois, I kwnow, but I have DSP:on also if i not have an hardware echocan module :/ and I always have Echo Cancellation: 0 taps, currently OFF. This is my zapata.conf [channels] language = it usecallerid = yes callwaiting = yes usecallingpres = yes callwaitingcallerid = yes threewaycalling = yes cancallforward = yes callreturn = yes switchtype = euroisdn signalling = bri_cpe_ptmp pridialplan = unknown prilocaldialplan = unknown echocancel = yes echocancelwhenbridged = yes echotraining = yes nationalprefix = 0 internationalprefix = 00 callerid = asreceived rxgain = -4.0 txgain = -2.0 immediate = no mailbox = [EMAIL PROTECTED] callgroup = 1 pickgroup = 1 group = 1 musiconhold = default context = incoming channel = 1-2 Thanks Giordano Grandis -Messaggio originale- Da: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Per conto di [EMAIL PROTECTED] Inviato: giovedì 30 marzo 2006 7.50 A: 'Asterisk Users Mailing List - Non-Commercial Discussion' Oggetto: RE : [Asterisk-Users] Echo cancellation Hi, zap show channel 5 To see channel 5 specs, and take a look at Echo Cancellation: 128 taps unless TDM bridged, currently OFF during calls, you must have ON. If you have hardware echocan module, as for TDM2400E, you must also read DSP: yes if this module is active. Best Regards, Francois BERGERET, France. -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Giordano Grandis Envoyé : mardi 28 mars 2006 16:54 À : Asterisk Users Mailing List - Non-Commercial Discussion Objet : R: [Asterisk-Users] Echo cancellation Ok, but is there a way to check if echo cancellation is active on a call in progress ? Thanks Giordano -Messaggio originale- Da: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Per conto di Steve Davies Inviato: martedì 28 marzo 2006 16.43 A: Asterisk Users Mailing List - Non-Commercial Discussion Oggetto: Re: [Asterisk-Users] Echo cancellation On 3/28/06, Giordano Grandis [EMAIL PROTECTED] wrote: Hi all, I'm using bristuff 0.2.0 RC8o with a HFC pci card and on several calls I saw that the echo cancellation is on OFF Echo Cancellation: 0 taps, currently OFF (the result of zap show channel 1-1 for example) Echo cancelling is only enabled if there is a call in progress. Cheers, Steve ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users BEGIN:VCARD VERSION:2.1 N:Grandis;Giordano FN:Giordano Grandis EMAIL;PREF;INTERNET:[EMAIL PROTECTED] REV:20060317T180609Z END:VCARD ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation
On 3/28/06, Giordano Grandis [EMAIL PROTECTED] wrote: Hi all, I'm using bristuff 0.2.0 RC8o with a HFC pci card and on several calls I saw that the echo cancellation is on OFF Echo Cancellation: 0 taps, currently OFF (the result of zap show channel 1-1 for example) Echo cancelling is only enabled if there is a call in progress. Cheers, Steve ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation
Seems Giordano only would have gotten a response to his query of the status of Zap/1-1 if a call _were_ in progress, hence the '-1'. Otherwise there would have been: Steve Davies wrote: On 3/28/06, Giordano Grandis [EMAIL PROTECTED] wrote: Hi all, I'm using bristuff 0.2.0 RC8o with a HFC pci card and on several calls I saw that the echo cancellation is on OFF Echo Cancellation: 0 taps, currently OFF (the result of zap show channel 1-1 for example) Echo cancelling is only enabled if there is a call in progress. Cheers, Steve ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- Mojo [EMAIL PROTECTED] Office Manger, Horan Company, LLC (907) 747- x112 ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation
Hmm, that control-enter thing got the better of me and sent the message before I was done. Just wanted to mention that if a call weren't in progress, he would have seen Zap/1-1 is not a known channel Moj Steve Davies wrote: On 3/28/06, Giordano Grandis [EMAIL PROTECTED] wrote: Hi all, I'm using bristuff 0.2.0 RC8o with a HFC pci card and on several calls I saw that the echo cancellation is on OFF Echo Cancellation: 0 taps, currently OFF (the result of zap show channel 1-1 for example) Echo cancelling is only enabled if there is a call in progress. Cheers, Steve ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- Mojo [EMAIL PROTECTED] Office Manger, Horan Company, LLC (907) 747- x112 ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] echo cancellation
Steven Langley wrote: Hi there I am using asterisk version 1.2.4. I have clients based on the iax client library dialling into meetme sessions. I am experiencing echo in the case where one or more users has speakers instead of headphones. So the audio from me is fed from the other participant's speakers into their mic and back to me. Echo cancellation is usually the responsibility of the speaker phone, one without E.C. is unusable. For instance, the Grandstream BT102's speaker phone. Doug ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] echo cancellation
My PocketPC with ppcIAX and/or SJPhone behaves in exactly the same way. The only resolution is to use an earbud... I'm guessing that the server's echo cancelling is intended to cancel minor echo introduced by the path, but doesn't handle 'real' echo caused by looping sound. Is that right? Bob McDowell -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Doug Lytle Sent: Wednesday, March 15, 2006 8:36 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] echo cancellation Steven Langley wrote: Hi there I am using asterisk version 1.2.4. I have clients based on the iax client library dialling into meetme sessions. I am experiencing echo in the case where one or more users has speakers instead of headphones. So the audio from me is fed from the other participant's speakers into their mic and back to me. Echo cancellation is usually the responsibility of the speaker phone, one without E.C. is unusable. For instance, the Grandstream BT102's speaker phone. Doug ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] echo cancellation
Bob McDowell wrote: My PocketPC with ppcIAX and/or SJPhone behaves in exactly the same way. The only resolution is to use an earbud... I'm guessing that the server's echo cancelling is intended to cancel minor echo introduced by the path, but doesn't handle 'real' echo caused by looping sound. Is that right? Asterisk's echo cancel is designed to cancel out echo caused by PSTN 2-wire circuits. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Echo Cancellation
That's good to know Francdois, I was not aware of that. I talked to a Sangoma tech about that possibility and they told me that although their hardware echo can is just an added module, there are some minor differences on the board it mounts to as well so it's not a possibility to upgrade a non-hardware echo can Sangoma analog card as far as I know. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 14, 2006 9:29 PM To: 'Asterisk Users Mailing List - Non-Commercial Discussion' Subject: RE : [Asterisk-Users] Echo Cancellation Hi Asterisk's people, You can buy Digium's card harware echo can models without the echo can module and buy it later if necessary. They are scalable ;-) Best Regards, Francois BERGERET, France. -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de mustardman29 Envoyé : mardi 14 mars 2006 22:24 À : 'Asterisk Users Mailing List - Non-Commercial Discussion' Objet : RE: [Asterisk-Users] Echo Cancellation The way I look at it, it's better to have hardware echo can and not need it than to need it and not have it. The cards are not upgradeable to hardware echo can and it is almost impossible to pre-determine if you will need it. Software echo can sometimes does a good enough job but it will never be as good as hardware. You get what you pay for. -Original Message- From: Keith Schmidt [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 14, 2006 9:05 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: [Asterisk-Users] Echo Cancellation I have 3 POTS lines that I want to use with Asterisk, I am looking at prices for FXO cards and the cards with echo cancellation are really pricey... is echo cancellation really worth it for a 3 or 4 line system? Will I notice a difference without the echo cancellation? Thanks Keith Schmidt ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo Cancellation
On Mar 14, 2006, at 9:04 AM, Keith Schmidt wrote: I have 3 POTS lines that I want to use with Asterisk, I am looking at prices for FXO cards and the cards with echo cancellation are really pricey... is echo cancellation really worth it for a 3 or 4 line system? Will I notice a difference without the echo cancellation? This depends greatly on the quality of your PSTN line and the distance from the CO (central office). In my case, with a two wire loop over 15000 feet, I definitely had echo issues that made cheapo FXO unusable. Although with a Digium card, you also have the option of using software based echo cancellation. I have no experience with that. Good echo cancellation is worth it in my opinion. Marty ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Echo Cancellation
The way I look at it, it's better to have hardware echo can and not need it than to need it and not have it. The cards are not upgradeable to hardware echo can and it is almost impossible to pre-determine if you will need it. Software echo can sometimes does a good enough job but it will never be as good as hardware. You get what you pay for. -Original Message- From: Keith Schmidt [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 14, 2006 9:05 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: [Asterisk-Users] Echo Cancellation I have 3 POTS lines that I want to use with Asterisk, I am looking at prices for FXO cards and the cards with echo cancellation are really pricey... is echo cancellation really worth it for a 3 or 4 line system? Will I notice a difference without the echo cancellation? Thanks Keith Schmidt ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo Cancellation
On Tue, 14 Mar 2006, Keith Schmidt wrote: I have 3 POTS lines that I want to use with Asterisk, I am looking at prices for FXO cards and the cards with echo cancellation are really pricey... is echo cancellation really worth it for a 3 or 4 line system? Will I notice a difference without the echo cancellation? yes you will. echo cancellation is not something you want to screw around with in a voip system. spend the money. get hardware with a good echo canceller. don't mess around. -Dan ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE : [Asterisk-Users] Echo Cancellation
Hi Asterisk's people, You can buy Digium's card harware echo can models without the echo can module and buy it later if necessary. They are scalable ;-) Best Regards, Francois BERGERET, France. -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de mustardman29 Envoyé : mardi 14 mars 2006 22:24 À : 'Asterisk Users Mailing List - Non-Commercial Discussion' Objet : RE: [Asterisk-Users] Echo Cancellation The way I look at it, it's better to have hardware echo can and not need it than to need it and not have it. The cards are not upgradeable to hardware echo can and it is almost impossible to pre-determine if you will need it. Software echo can sometimes does a good enough job but it will never be as good as hardware. You get what you pay for. -Original Message- From: Keith Schmidt [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 14, 2006 9:05 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: [Asterisk-Users] Echo Cancellation I have 3 POTS lines that I want to use with Asterisk, I am looking at prices for FXO cards and the cards with echo cancellation are really pricey... is echo cancellation really worth it for a 3 or 4 line system? Will I notice a difference without the echo cancellation? Thanks Keith Schmidt ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation
Asterisk performs echo cancellation for all incoming and outgoing calls through the T1/PRI card. However, there are some things that canstill cause echo's. We had a similar situation a with a setup much like yours. We switched to the MG2 echo canceller which helped quite a bit. But finally, after testing everything else we possibly could, swapping out PRI cards, changing every concevable setting related to echo, and having the phone company out about a dozen times to check the PRI, we ended up switching companies from Telepacific to Sprint and the echo problem, according to the users, completely went away. However, a couple things you may want to look at is the audio gain settings in your zapata.conf and make sure they're not set too high, maybe even try dropping them down a bit. And try the MG2 echo canceller if you haven't already, it seems to provide the best results on PRI's, at least as far as our testing has gone. Erick On 1/3/06, Aaron Daniel [EMAIL PROTECTED] wrote: We currently have about 60 cisco 7940's, which were converted from ciscocall manager to be used for asterisk.We're running 1.2.1 stable on 4systems (primary server, backup server, gateway, and voicemail).Thephone lines come into the gateway on a digium te405p.The problem we'rehaving is that the 7940's are echoing on outgoing calls, and I'm not sure what else to try (I did just recompile zaptel with a different echocanceler to see if it would help), but I seem to remember asteriskdoesn't do echo cancellation on outgoing calls.I researched a bit on qos and latency, but there's maybe a 10ms latency between the phone andthe outgoing line, so I ruled that out pretty quick.Any help isgreatly appreciated.AaronOn Tue, 2006-01-03 at 21:26 -0800, Erick Baum wrote: Can you provide some details about the system, what version of Asterisk, what kind of phones, what kind of phone lines, etc. Erick On 1/3/06, Aaron Daniel [EMAIL PROTECTED] wrote: I've got a slight problem with echo.Basically, most of the outgoing phone calls on our system echo, but as far as I can tell, the incoming echo has been relatively fixed, with just a bit of work left to do on it.I read somewhere that asterisk doesn't echo cancel on outgoing calls, am I wrong in that assumption, and if I am, what else can be done when the echo training and echo cancel tapping isn't working? Aaron ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation
Can you provide some details about the system, what version of Asterisk, what kind of phones, what kind of phone lines, etc. Erick On 1/3/06, Aaron Daniel [EMAIL PROTECTED] wrote: I've got a slight problem with echo.Basically, most of the outgoingphone calls on our system echo, but as far as I can tell, the incoming echo has been relatively fixed, with just a bit of work left to do onit.I read somewhere that asterisk doesn't echo cancel on outgoingcalls, am I wrong in that assumption, and if I am, what else can be done when the echo training and echo cancel tapping isn't working?Aaron___--Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing listTo UNSUBSCRIBE or update options visit:http://lists.digium.com/mailman/listinfo/asterisk-users -- | Erick Baum| Teal Networks, Inc.| http://www.teal.net ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation
We currently have about 60 cisco 7940's, which were converted from cisco call manager to be used for asterisk. We're running 1.2.1 stable on 4 systems (primary server, backup server, gateway, and voicemail). The phone lines come into the gateway on a digium te405p. The problem we're having is that the 7940's are echoing on outgoing calls, and I'm not sure what else to try (I did just recompile zaptel with a different echo canceler to see if it would help), but I seem to remember asterisk doesn't do echo cancellation on outgoing calls. I researched a bit on qos and latency, but there's maybe a 10ms latency between the phone and the outgoing line, so I ruled that out pretty quick. Any help is greatly appreciated. Aaron On Tue, 2006-01-03 at 21:26 -0800, Erick Baum wrote: Can you provide some details about the system, what version of Asterisk, what kind of phones, what kind of phone lines, etc. Erick On 1/3/06, Aaron Daniel [EMAIL PROTECTED] wrote: I've got a slight problem with echo. Basically, most of the outgoing phone calls on our system echo, but as far as I can tell, the incoming echo has been relatively fixed, with just a bit of work left to do on it. I read somewhere that asterisk doesn't echo cancel on outgoing calls, am I wrong in that assumption, and if I am, what else can be done when the echo training and echo cancel tapping isn't working? Aaron ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- | Erick Baum | Teal Networks, Inc. | http://www.teal.net ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Echo cancellation
I am having problems with echo, first let me explain my setup: I have a Gateway box, which basically is an Asterisk with a PRI card. It's only job is to interface with 2 incoming ISDN PRI connections. Then there are two other asterisk boxes to which my users are registered. Dialing from a phone it hits the first asterisk which forwards it to the gateway box and then on to the PSTN. What are the general causes of echo? When calling from my SIP phone I hear no echo but the other end, the PSTN end, hears a lot of echo. What could cause this? Kristian. You need to google echo on the wiki. There are so many causes for echo and possible fixes that work on some installations but not others. Some keywords to search for are echo pri and echo avoidance From reading the list, there is no echo introduced by a PRI and the echo is created by the far side. Nonetheless, it is still your problem. I would first try have a phone register directly to the box with the PRI card and see if there is any difference. I would then check your Zapata.conf settings and adjust gains and also try different echo can settings. Make sure to change one thing at a time and restart asterisk and test. Write down your results so you can get an idea for what is working. Finally, if that is still not helping, you can change the echo can method. Trial and error. Digium sells a hardware echo can upgrade for their cards as well but I think it may only be an option for the quad port cards. Finally, if that still is not working, then you may want to see what 3rd party devices others have used. I have seen success stories posted but am not sure what was used. I think the reason for the 3rd party devices working when * software echo can cannot is the size of the tail. Thanks, Steve ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Echo cancellation over satellite link
Title: Message 2 Things... You probably know anyway... Early echo cancel for satellite just used half duplex switching as a way to get around the echo (This led to the echo suppess tone being used for faxes and modems to allow full duplex). From my Telephony days the echo comes mostly from a mismatch in the hybrid at the other end of the link from where the echo is heard. Regards Randall Prentice Just wondering, is the echo canceller in the TE411P capable of cancellingthe echo caused by the delay over satellite link (i.e. approx 400 ms delay)? Does anyone have any success story to share? I'm kinda stuck with a really2 annoying echo... adjusting the gain didn't help... and what should my zapata.conf look like for effective echo cancellation? Thanks in advance ^_^ ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation over satellite link
funny guy wrote: Just wondering, is the echo canceller in the TE411P capable of cancelling the echo caused by the delay over satellite link (i.e. approx 400 ms delay)? Does anyone have any success story to share? I'm kinda stuck with a really2 annoying echo... adjusting the gain didn't help... and what should my zapata.conf look like for effective echo cancellation? Echocan should be placed as close to the PSTN as you can. I.e. Asterisk - high latency connection - echocan - PSTN. Not Asterisk - echocan - high latency connection - PSTN. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation over satellite link
On Tuesday 06 December 2005 00:58, funny guy wrote: Just wondering, is the echo canceller in the TE411P capable of cancelling the echo caused by the delay over satellite link (i.e. approx 400 ms delay)? No. Use MARK2, KB1 or MG2 and enable the agressive mode -- this converts your link to a half-duplex link and you won't have any echo, but it will sound very walkie-talkie-like... but given that you've got damn near one-half second latency I don't think that's going to be a problem. -A. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation over satellite link
I don't know about your echo problem, but when you have such high latency please don't call me :) On 12/6/05, Andrew Kohlsmith [EMAIL PROTECTED] wrote: On Tuesday 06 December 2005 00:58, funny guy wrote: Just wondering, is the echo canceller in the TE411P capable of cancelling the echo caused by the delay over satellite link (i.e. approx 400 ms delay)? No. Use MARK2, KB1 or MG2 and enable the agressive mode -- this converts your link to a half-duplex link and you won't have any echo, but it will sound very walkie-talkie-like... but given that you've got damn near one-half second latency I don't think that's going to be a problem. -A. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation over satellite link
On 12/6/05, funny guy [EMAIL PROTECTED] wrote: Hi, Just wondering, is the echo canceller in the TE411P capable of cancelling the echo caused by the delay over satellite link (i.e. approx 400 ms delay)? Does anyone have any success story to share? I'm kinda stuck with a really2 annoying echo... adjusting the gain didn't help... and what should my zapata.conf look like for effective echo cancellation? Thanks in advance ^_^ No. Neither Digium nor Sangoma I believe are putting in hardware cans that would support a 400ms+ tail. I think the most you're going to get is 128ms. -- Bird's The Word Technologies, Inc. http://www.btwtech.com/ ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation over satellite link
Good luck. I am running dedicated echo cans and they only go to 192ms. I do not think 400ms would be regarded as toll quality which is what most links strive for. Byt the time the echo cans buffer enough so they can cancel 400 you would have some extreme latency. My .02 anyway. On Dec 6, 2005, at 12:03 AM, BJ Weschke wrote: On 12/6/05, funny guy [EMAIL PROTECTED] wrote: Hi, Just wondering, is the echo canceller in the TE411P capable of cancelling the echo caused by the delay over satellite link (i.e. approx 400 ms delay)? Does anyone have any success story to share? I'm kinda stuck with a really2 annoying echo... adjusting the gain didn't help... and what should my zapata.conf look like for effective echo cancellation? Thanks in advance ^_^ No. Neither Digium nor Sangoma I believe are putting in hardware cans that would support a 400ms+ tail. I think the most you're going to get is 128ms. -- Bird's The Word Technologies, Inc. http://www.btwtech.com/ ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Echo cancellation over satellite link
In software asterisk can support more than that, no? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of BJ Weschke Sent: Tuesday, 6 December 2005 17:03 To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Echo cancellation over satellite link On 12/6/05, funny guy [EMAIL PROTECTED] wrote: Hi, Just wondering, is the echo canceller in the TE411P capable of cancelling the echo caused by the delay over satellite link (i.e. approx 400 ms delay)? Does anyone have any success story to share? I'm kinda stuck with a really2 annoying echo... adjusting the gain didn't help... and what should my zapata.conf look like for effective echo cancellation? Thanks in advance ^_^ No. Neither Digium nor Sangoma I believe are putting in hardware cans that would support a 400ms+ tail. I think the most you're going to get is 128ms. -- Bird's The Word Technologies, Inc. http://www.btwtech.com/ ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Echo Cancellation not working in Zapata.conf
Nevermind. It turns out that if you are not on an active call on the channel, the zap show channel x shows OFF by default. After placing a call and checking the channel, it showed Echo Cancellation: 128 taps, currently on as it should. So our setup is correct after all. Alberto From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Alberto Risco Sent: Friday, September 30, 2005 9:58 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: [Asterisk-Users] Echo Cancellation not working in Zapata.conf I have echocancel=yes in zapata.conf but when I do a zap show channel 1, I notice echo cancellation is turned off. I followed the article that talks about the order in which the statements need to be in zapata.conf to get echo canceling to work: http://lists.digium.com/pipermail/asterisk-users/2005-June/110615.html But it is still not working. Does anyone know how to get echo cancellation to work? We have Asterisk 1.0.7 and Zaptel 1.0.9 with 2 PRIs using a TE410P board. Here is the output from the CLI: zap show channel 1 Channel: 1*CLI File Descriptor: 25 Span: 1 Extension: Dialing: no Context: aheeva Caller ID string: Destroy: 0 InAlarm: 0 Signalling Type: PRI Signalling Owner: None Real: NoneLI Callwait: None Threeway: None Confno: -1 Propagated Conference: -1 Real in conference: 0 DSP: no Relax DTMF: yes Dialing/CallwaitCAS: 0/0 Default law: ulaw Fax Handled: no Pulse phone: no Echo Cancellation: 128 taps, currently OFF PRI Flags: PRI Logical Span: Implicit Actual Hookstate: Onhook Here is my Zapata.conf: ; Zapata telephony interface ; ; Configuration file [channels] ; usecallerid=yes hidecallerid=no callwaiting=no restrictcid=no usecallingpres=yes callwaitingcallerid=yes threewaycalling=no transfer=no cancallforward=yes callreturn=yes callerid=asreceived ; relaxdtmf=yes ; rxgain=0.0 txgain=0.0 immediate=no ; ; Configure jitter buffers in zapata (each one is 20ms, default is 4) ; jitterbuffers=4 ; context=aheeva switchtype=national signalling=pri_cpe pridialplan=unknown ; needed to pass proper # digits to PRI echocancel=yes echotraining=yes echocancelwhenbridged=yes group = 1 channel = 1-23 ;channel = 25-48 Thanks, Alberto The contents of this email message and any attachments are confidential and are intended solely for addressee. The information may also be legally privileged. This transmission is sent in trust, for the sole purpose of delivery to the intended recipient. If you have received this transmission in error, any use, reproduction or dissemination of this transmission is strictly prohibited. If you are not the intended recipient, please immediately notify the sender by reply email and delete this message and its attachments, if any. ___ --Bandwidth and Colocation sponsored by Easynews.com -- Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo Cancellation not working in Zapata.conf
On Friday 30 September 2005 09:57, Alberto Risco wrote: I have echocancel=yes in zapata.conf but when I do a zap show channel 1, I notice echo cancellation is turned off. If the channel is not in use, echo cancellation will be off. Your show zap channel output shows it's on-hook, so the DSP and echo canceller will be off. Are you actually having issues or are you falling into the trap of overanalyzing everything? -A. ___ --Bandwidth and Colocation sponsored by Easynews.com -- Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation again ...
Aug 17, 2005, at 5:44 AM, Tom Hayden wrote: I have experienced pretty nasty echo on my PRI w/TE110P. The echo was only coming from other POTS lines, because cell phones already have echo cancellation, and other PBX's had the same. I resolved the problem by turning on the AGGRESSIVE option and it works fine now, and we haven't noticed a severe degradation in sound quality - most of my operators were just happy the echo was gone :) +1 here too: Uncommenting AGGRESSIVE_SUPPRESSOR and recompiling took care of 99% of my TE110P/PRI echo. -Rob. -- Robert Goodyear Brand Up LLC http://www.brand-up.com ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation again ...
Rich Adamson wrote: I have been reading with great interest the posts on trouble shooting echo cancellation with *. Is it just coincidence that all of this discussion has been with analog lines. Are PRI's susceptible to echo problem like POTS lines. Keep reading. Echo _can_ occur whenever a two-wire circuit is converted to a four-wire circuit (eg, hybrid involved). There is no way for you to identify where (in a pstn call) that might occur even with a PRI. You could have a PRI (four-wire) leaving your facility, but the telco (or another pstn customer) may have a hybrid involved in that end-to-end call. Very nice summary post. One thing to remember: If your side of the call is hearing an echo, it is being caused somewhere on the other side. Also, there are two kinds of echo. Hybrid echo, which has now been discussed, and accoustic echo. Any echo can be batteld best at the place where it is caused, and this is especially true for accoustic echo. With accoustic echo, see if the source device (handset, speakerphone, ...) can be tuned properly (echocancellation settings, echosuppression or maybe just lowering the volume a bit). Also note: An echo becomes more and more problematic as the round-trip delay time increases. Best regards, Florian ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Echo cancellation again ...
I have a PRI with quite a nasty echo problem that I cannot seem to get rid of. I've tried all of the echo cancellation settings and tweaked gains to hell and back but still get echo. I am convinced it can only be addressed by hardware echo cancellation but that's not an option unless I replace my TE110P. Craig Bruenderman Network Advocates, Inc. 300 Envoy Circle Suite 300 Louisville, KY 40299 Main: 502-412-1050 DID: 502-992-5929 Fax: 502-412-1058 Mobile: 502-548-1100 -Original Message- From: [EMAIL PROTECTED] [mailto:asterisk-users- [EMAIL PROTECTED] On Behalf Of Alan Bunch Sent: Wednesday, August 17, 2005 8:18 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: [Asterisk-Users] Echo cancellation again ... I have been reading with great interest the posts on trouble shooting echo cancellation with *. Is it just coincidence that all of this discussion has been with analog lines. Are PRI's susceptible to echo problem like POTS lines. Thanks for clearing this up. Alan ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation again ...
Alan Bunch wrote: I have been reading with great interest the posts on trouble shooting echo cancellation with *. Is it just coincidence that all of this discussion has been with analog lines. Are PRI's susceptible to echo problem like POTS lines. Alan, I have experienced echo on our PRI with EC turned off. Granted, it was Asterisk server 1 connecting via IAX to server 2, connecting via a PRI to call my cell phone. Turning on EC removed this echo. Doug ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation again ...
I have experienced pretty nasty echo on my PRI w/TE110P. The echo was only coming from other POTS lines, because cell phones already have echo cancellation, and other PBX's had the same. I resolved the problem by turning on the AGGRESSIVE option and it works fine now, and we haven't noticed a severe degradation in sound quality - most of my operators were just happy the echo was gone :) -- Tom Hayden Astoria Telecom, LLC www.astoriatelecom.net On 8/17/05, Doug Lytle [EMAIL PROTECTED] wrote: Alan Bunch wrote: I have been reading with great interest the posts on trouble shooting echo cancellation with *. Is it just coincidence that all of this discussion has been with analog lines. Are PRI's susceptible to echo problem like POTS lines. Alan, I have experienced echo on our PRI with EC turned off. Granted, it was Asterisk server 1 connecting via IAX to server 2, connecting via a PRI to call my cell phone. Turning on EC removed this echo. Doug ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- Tom ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation again ...
I have been reading with great interest the posts on trouble shooting echo cancellation with *. Is it just coincidence that all of this discussion has been with analog lines. Are PRI's susceptible to echo problem like POTS lines. Keep reading. Echo _can_ occur whenever a two-wire circuit is converted to a four-wire circuit (eg, hybrid involved). There is no way for you to identify where (in a pstn call) that might occur even with a PRI. You could have a PRI (four-wire) leaving your facility, but the telco (or another pstn customer) may have a hybrid involved in that end-to-end call. Hybrids are most often associated with analog circuits, so you'll see a large number of postings relative to echo on X100P and TDM cards. But, that certainly does not support 'echo is only a problem on analog circuits'. It doesn't help that a majority of current telco technicians wouldn't recognize a hybrid (or echo canceller) if it hit them in the face. Add to that the number of readers that repeat other postings without any reasonable knowledge of what they are talking about, and you get a substantial variation in the cause of echo (and how to troubleshoot it). Its probably one of the most difficult telephony issues to troubleshoot as there aren't any real tools available to pin-point the source. It just happens that asterisk has more then its fair share of echo problems, and you'll find a large number of postings that suggest asterisk's echo canceller does not have a very wide operating range. (E.g., the exact same asterisk system moved from one location to another will exhibit different echo characteristics due to the differences in pstn lines, etc. Analog interfaces having more echo problems by far then digital PRI interfaces.) The companies that specialize in digital to analog interfaces (eg, channel banks, external pstn adapters) typically have more dedicated processing power to perform echo cancellation, plus those companies spend a fair amount of research and development time to make cancellation work correctly. If they didn't, they wouldn't be able to sell their products. A true end-to-end PRI will _never_ generate echo; but, the stuff that customer's (large and small) attach on the other end of a PRI certainly can cause echo. And, believe it or not, there are still a large number of telco switches that are purely analog, thus requiring a digital to analog converter (hybrid). ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] echo cancellation on an iax2 channel
Script Head wrote: I have minor echo on an IAX2 channel when using Firefly and a head set. I have tried various headsets and settings but still a little bit of the echo remains and I'd love to get rid of it. After some research I stubled on zaptel/mec2.h but it seem that it works only on the ZAP channel. Is there something I can do on the IAX2 channel? Basically no. You cannot apply echo cancellation to a VoIP path. The path length needs to be precisely constant for the algorithms to work. That cannot be guaranteed over a VoIP path. A VoIP phone (hard or soft) needs to remove the echo at source. Good ones do. Bad ones, including some expensive ones, do not. Regards, Steve ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Echo Cancellation
We use a product from oriontelecom.com. The interface is rough, but we have not had a single problem since putting this in. Stephen Dolloff DLS Internet Services 847-854-4799 x256 [EMAIL PROTECTED] -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Richard Cook Sent: Wednesday, February 09, 2005 5:11 PM To: asterisk-users@lists.digium.com Subject: [Asterisk-Users] Echo Cancellation Can anyone provide a good manufacturer of echo cancellation equipment for a PRI? -- Richard Cook [EMAIL PROTECTED] T: 705-497-9320 x2010 image001.gif___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation, when software doesn't cut it. Whats next?
Over the last couple weeks I've tried everything I could get my hands on in an attempt to get rid of my echo problems. Using a CVS checkout of just yesterday, I've tried every echo cancellation routine in zconfig.h (including Mark2 w/Aggressive) , as well as the echotraining=800 mentioned on this list just last week. While some things worked better then others, I would consider none acceptable solutions in my situation. Playing with rx/tx gain values just seemed to quiet the voice down and along with that the echo happened to be less noticeable. I could almost get the echo to disappear with a low enough rx/tx gain, but then the voice could barely be heard, or DTMF tones stopped working. So whats the next step? I only get echo when dialing over the PSTN. Using Nufone to dial a PSTN number results in absolutely zero echo. Do I put in a request for a Telco technician to come out and take a look at the lines? One page on the Wiki says: Most of the telco's have technicians with the equipment necessary to help find the problem if the problem really is their outside plant. However, getting to that person can be a real challenge. Any suggestions on ways to overcome the challenge of getting the right technician on the phone? Mike, Contact me off list and let's see if we can isolate the issue. Can't tell from the words you've used what steps you've gone through to date. Rich ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Echo cancellation, when software doesn't cut it. Whats next?
All voip providers will use digital 4-wire interconnect to Asterisk or similar, so echo problems are much reduced, as there are only 'echo points' at the far end and your handset. Using an analogue card will always have its issues if you have significant propagation delay in the path anywhere. You will see much bigger echo problems where the line is mismatched to the analogue card. This will be in most places other than the US, as the analogue cards only seem to support a 600 ohm line impedance. If you want my recommendation, abandon analogue and get a basic rate ISDN line and a zaphfc card. Rgds Tim -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rich Adamson Sent: 01 July 2004 14:21 To: [EMAIL PROTECTED] Subject: Re: [Asterisk-Users] Echo cancellation, when software doesn't cut it. Whats next? Over the last couple weeks I've tried everything I could get my hands on in an attempt to get rid of my echo problems. Using a CVS checkout of just yesterday, I've tried every echo cancellation routine in zconfig.h (including Mark2 w/Aggressive) , as well as the echotraining=800 mentioned on this list just last week. While some things worked better then others, I would consider none acceptable solutions in my situation. Playing with rx/tx gain values just seemed to quiet the voice down and along with that the echo happened to be less noticeable. I could almost get the echo to disappear with a low enough rx/tx gain, but then the voice could barely be heard, or DTMF tones stopped working. So whats the next step? I only get echo when dialing over the PSTN. Using Nufone to dial a PSTN number results in absolutely zero echo. Do I put in a request for a Telco technician to come out and take a look at the lines? One page on the Wiki says: Most of the telco's have technicians with the equipment necessary to help find the problem if the problem really is their outside plant. However, getting to that person can be a real challenge. Any suggestions on ways to overcome the challenge of getting the right technician on the phone? Mike, Contact me off list and let's see if we can isolate the issue. Can't tell from the words you've used what steps you've gone through to date. Rich ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation, when software doesn't cut it. Whats next?
On Thursday 01 July 2004 08:39, Robinson Tim-W10277 wrote: All voip providers will use digital 4-wire interconnect to Asterisk or similar, so echo problems are much reduced, as there are only 'echo points' at the far end and your handset. And on my PRI that is specifically where my echo is coming from... the far end. VOIP calls through nufone have no echo MOST PSTN calls through the PRI have no echo SOME PSTN calls (usually to local numbers NOT terminated at my local CO) have significant echo... I too have been unsuccessful in getting this zapped. My connection: Norstart MICS -- Adit600 --- T100P -- IAX2 -- TE405P -- Bell Canada PRI *1 = Xeon/2.4 with HT with T100P *2 = Xeon/2.4 with HT with TE405P *2 also does the NuFone IAX2 connection (it is always in the loop, as *1 is on a private network) Strange stuff, I am going to look at T1 echo cancellation hardware if I cant' get this solved. Tried: - echotraining=800 on *1 and *2 - echocancel=32,64,128 on both Eventually the MICS will have a digital connection to *1 instead of going through the Adit600 but we haven't got there yet :-) Regards, Andrew ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation, when software doesn't cut it. Whats next?
Obviously the less I spend the better. But if we have to, a few thousand more I guess. The problem I have is that this setup is more of a trial run. Once it works, I'm going to be cloning slightly smaller setups to 9 other cities. But they are pretty small, 1 or 2 lines and 2-4 phones in each location. I will only be using POTS lines in each location. The current setup works great besides the echo, and some of the information I've read point to the Telco being the issue. If thats the case, I should in theory be able to get them to fix the problem. (though I could be dreaming) On Wed, 2004-06-30 at 22:42 -0500, Daniel Jimenez wrote: Mike Benoit wrote: So whats the next step? How much money are you willing to put in the project? Are you talking POTS lines or a PRI? If this is a serious project and you'd really like to clear it up I'd look at a Cisco device (maybe one of the newer rackmount 1700s) with FXO ports or a Serial interface for PRI. You can use h.323 or SIP to communicate with the device. -- Mike Benoit [EMAIL PROTECTED] ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation, when software doesn't cut it. Whats next?
I've got the same problem NEAR end echo (We hear the echo on OUR side, person on the PSTN never hears it..) We're tyring to get our PRI carrier to run us through a echo can, or re-write it through a switch they have which has built in echo cans... Ugg.. Thanks, Billy - Original Message - From: Andrew Kohlsmith [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, July 01, 2004 10:56 AM Subject: Re: [Asterisk-Users] Echo cancellation, when software doesn't cut it. Whats next? On Thursday 01 July 2004 08:39, Robinson Tim-W10277 wrote: All voip providers will use digital 4-wire interconnect to Asterisk or similar, so echo problems are much reduced, as there are only 'echo points' at the far end and your handset. And on my PRI that is specifically where my echo is coming from... the far end. VOIP calls through nufone have no echo MOST PSTN calls through the PRI have no echo SOME PSTN calls (usually to local numbers NOT terminated at my local CO) have significant echo... I too have been unsuccessful in getting this zapped. My connection: Norstart MICS -- Adit600 --- T100P -- IAX2 -- TE405P -- Bell Canada PRI *1 = Xeon/2.4 with HT with T100P *2 = Xeon/2.4 with HT with TE405P *2 also does the NuFone IAX2 connection (it is always in the loop, as *1 is on a private network) Strange stuff, I am going to look at T1 echo cancellation hardware if I cant' get this solved. Tried: - echotraining=800 on *1 and *2 - echocancel=32,64,128 on both Eventually the MICS will have a digital connection to *1 instead of going through the Adit600 but we haven't got there yet :-) Regards, Andrew ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation, when software doesn't cut it. Whats next?
On Thursday 01 July 2004 12:03, Billy Huddleston wrote: I've got the same problem NEAR end echo (We hear the echo on OUR side, person on the PSTN never hears it..) That's what I have -- I called it far-end echo because I hear the echo, so it's coming from the far-end. We're tyring to get our PRI carrier to run us through a echo can, or re-write it through a switch they have which has built in echo cans... Bell claims they have no idea what a T1 echo canceller is. hahaha. Regards, Andrew ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation, when software doesn't cut it. Whats next?
On Thu, 1 Jul 2004, Mike Benoit wrote: Obviously the less I spend the better. But if we have to, a few thousand more I guess. The problem I have is that this setup is more of a trial run. Once it works, I'm going to be cloning slightly smaller setups to 9 other cities. But they are pretty small, 1 or 2 lines and 2-4 phones in each location. I totally understand this. My users complain frequently about echo, and I am still unable to determine why sometimes it works great, other's it does not. The CPU and Memory are powerful enough to handle it, and we rarely ever see any load on the box. I too feel this is the major caveat to Asterisk right now. I am curious how anyone is achieving a near echo free system. We are shooting for 1 out of every 300 calls to have echo, which I think can be a realistic goal. Given the nature of open source, and the mix-and-match of components that come up, I can see where Digium is in a hard place to nail down the cause of every occurance. I will only be using POTS lines in each location. The current setup works great besides the echo, and some of the information I've read point to the Telco being the issue. If thats the case, I should in theory be able to get them to fix the problem. (though I could be dreaming) I think ultimately, if a Mediatrix box, or Cisco box can accomplish echo cancellation, Asterisk should be able to do it with as much success. Being that I am not an experienced Programmer, I try not to complain to loudly. With my level of involvement, I typically make the business case to customers and spec out ROI, etc. I do have a technical background, and am getting better at trouble shooting Asterisk and working on the source code. In fact, subscribing to the CVS list has taken me leap years ahead of understanding the changes and why they are being committed. I don't know how much more putting a DSP to handle echo can on the cards would cost, but if it were 400 - 500 more I would certainly pay it without a second thought, provided it worked. Echo, I think, is the largest draw back to VoIP, and will be the limit to entry into many businesses. I know my client, if they were to do it all over again, would choose a regular TDM (nortel, avaya) solution over the echo they are experiencing. I think asterisk is definitly headed in the right direction though, and nothing good comes over night. So everyone who has worked on it deserves to be commended. Without their insight and dedication, we wouldn't even be talking about this, or have alternatives to turn to. Regards, - Brent ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation, when software doesn't cut it. Whats next?
I failed to mention I'm using a Cisco 2600 with Sip Re-invites.. and YES, I do have the echo can on the Cisco turned on, The echo is S bad, it's not even touching it... When we place 1-800 calls or call LD via our offnet provider, everything works fine, it's just with local calls on the PRI... We found out that the 1-800 #'s go out our carriers Sonus switch (a VoIP switch) which has 128ms Echo Can in it... Hmmm... Thanks, Billy - Original Message - From: Brent Franks [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, July 01, 2004 12:16 PM Subject: Re: [Asterisk-Users] Echo cancellation, when software doesn't cut it. Whats next? On Thu, 1 Jul 2004, Mike Benoit wrote: Obviously the less I spend the better. But if we have to, a few thousand more I guess. The problem I have is that this setup is more of a trial run. Once it works, I'm going to be cloning slightly smaller setups to 9 other cities. But they are pretty small, 1 or 2 lines and 2-4 phones in each location. I totally understand this. My users complain frequently about echo, and I am still unable to determine why sometimes it works great, other's it does not. The CPU and Memory are powerful enough to handle it, and we rarely ever see any load on the box. I too feel this is the major caveat to Asterisk right now. I am curious how anyone is achieving a near echo free system. We are shooting for 1 out of every 300 calls to have echo, which I think can be a realistic goal. Given the nature of open source, and the mix-and-match of components that come up, I can see where Digium is in a hard place to nail down the cause of every occurance. I will only be using POTS lines in each location. The current setup works great besides the echo, and some of the information I've read point to the Telco being the issue. If thats the case, I should in theory be able to get them to fix the problem. (though I could be dreaming) I think ultimately, if a Mediatrix box, or Cisco box can accomplish echo cancellation, Asterisk should be able to do it with as much success. Being that I am not an experienced Programmer, I try not to complain to loudly. With my level of involvement, I typically make the business case to customers and spec out ROI, etc. I do have a technical background, and am getting better at trouble shooting Asterisk and working on the source code. In fact, subscribing to the CVS list has taken me leap years ahead of understanding the changes and why they are being committed. I don't know how much more putting a DSP to handle echo can on the cards would cost, but if it were 400 - 500 more I would certainly pay it without a second thought, provided it worked. Echo, I think, is the largest draw back to VoIP, and will be the limit to entry into many businesses. I know my client, if they were to do it all over again, would choose a regular TDM (nortel, avaya) solution over the echo they are experiencing. I think asterisk is definitly headed in the right direction though, and nothing good comes over night. So everyone who has worked on it deserves to be commended. Without their insight and dedication, we wouldn't even be talking about this, or have alternatives to turn to. Regards, - Brent ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo cancellation, when software doesn't cut it. Whats next?
Mike Benoit wrote: So whats the next step? How much money are you willing to put in the project? Are you talking POTS lines or a PRI? If this is a serious project and you'd really like to clear it up I'd look at a Cisco device (maybe one of the newer rackmount 1700s) with FXO ports or a Serial interface for PRI. You can use h.323 or SIP to communicate with the device. -- Daniel Jimenez djimenez[at]pobox[dot]com ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo Cancellation Feature
I would also offer feedback that we too have random calls with echo on our end, that can't be traced to a reproducible event. It's very odd and can be frustrating, as it's a big distraction for those that don't know better. Like a bad cell phone connection when you hear yourself talk. For us, this happens in a pure SIP environment on a network switch dedicated to Asterisk, a T1 PRI and 18 SIP handsets. HTH, Ryan On Apr 22, 2004, at 1:37 PM, Brent Franks wrote: I do feel the echo cancellation does need some work. Currently, other than listening to users, there is no way to benchmark or trouble shoot echo problems. We find that 2 to 3 out of every 20 calls will experience echo. While echo is a problem that naturally occurs from SIP - PSTN and vice versa, I am still baffled by the fact that the cancellation works randomly. snip ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo Cancellation Feature
I do feel the echo cancellation does need some work. Currently, other than listening to users, there is no way to benchmark or trouble shoot echo problems. Sure there are, it's just that 99% of the asterisk implementors don't have the test equipment to do it, and a good share probably wouldn't know how to do it if they had access to the equipment. We find that 2 to 3 out of every 20 calls will experience echo. While echo is a problem that naturally occurs from SIP - PSTN and vice versa, I am still baffled by the fact that the cancellation works randomly. When doing a zap show channel X, it will also report that the cancellation is still on. We experience the most echo with a T100P -- Adtran TA 750 FXO modules. While I understand these do not have impedence matching, I wonder to myself why echo cancellation works sometimes, and others not. Looking at Network util, processor util, and memory utilization, they do not provide any clear indication as to why /when it occurs. Not likely to have any impact whatsoever. Is there anything more that can be done to debug echo cancellation, and further are other users experiencing this random echo. I know it was discussed before, but the support folks at digium aren't able to offer anymore help. You've probably read enough from previous postings to know there are several different locations within an end-to-end voice call where echo can creap into a system. In very general terms, any place where an end-to-end channel incures a two-wire to four-wire conversion (whether done in hardware or software), echo can creap in due to lots of different reasons. Since asterisk provides us with lots of configuration choices, hardly any two systems are alike. Therefore, don't know that anyone is going to write * code anytime soon to correct something that can't be pointed to, etc. Someone mentioned they have echo on sip to sip calls (presumably the call was processed by a single * system). If they do, the problem is likely in the sip phone as there are no echo cancallation needs in that four-wire end-to-end call from an * perspective. I've got a fair amount of test equipment (and 20+ years telephony background), and am planning to assemble a document identifying some of the pstn issues, level settings, and other things impacting a reasonable system implementation. Unless someone wants to UPS a transmission test set to me quickly, the document won't be completed for several weeks. (The only test set I have access to will not be released for a couple of weeks due to classes, etc.) I'm also expecting these tests to point out a number of other transmission issues within asterisk that we'll get documented with real numbers, etc. Rich ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Echo Cancellation Feature
snip I've got a fair amount of test equipment (and 20+ years telephony background), and am planning to assemble a document identifying some of the pstn issues, level settings, and other things impacting a reasonable system implementation. Unless someone wants to UPS a transmission test set to me quickly, the document won't be completed for several weeks. (The only test set I have access to will not be released for a couple of weeks due to classes, etc.) I'm also expecting these tests to point out a number of other transmission issues within asterisk that we'll get documented with real numbers, etc. Rich ___ Rich, One suggestion I would like to make, is where possible, tell us how to replicate the tests as best we can if we don't have the proper equipment. I'd venture to say most of us have a good, fairly sensitive, digital VOM. I know not all tests can be made with that, but I'm sure some of them can. There are fairly accurate tone generator programs that work with a sound card, same with data decoding. My point is, as you said before, not everyone has a multi-thousand dollar test set, but would still like to do what they can to properly implement a telephone system. Thanks, Jeremy ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo Cancellation Feature
At 02:30 PM 4/22/2004, you wrote: I would also offer feedback that we too have random calls with echo on our end, that can't be traced to a reproducible event. It's very odd and can be frustrating, as it's a big distraction for those that don't know better. Like a bad cell phone connection when you hear yourself talk. For us, this happens in a pure SIP environment on a network switch dedicated to Asterisk, a T1 PRI and 18 SIP handsets. HTH, Ryan We have three Cisco 7940 SIP phones and 1 POTS phone connected to our * server with TDM10B fxs card. Our * server is connected to the pstn with 3 X100P cards. We have similar echo problems but only on our SIP phones. We do not have any echo problems with the POTS phone. We just purchased a Polycom IP 500 SIP phone to test but I expect similar echo problems. The recent thread which addressed milliwatt generators and gain adjustments helped to reduce our echo but the thread was never completed. We are not sure how to test the TX gain adjustment and where on the graph to set the RX gain when using a milliwatt generator tone. Tom Tom On Apr 22, 2004, at 1:37 PM, Brent Franks wrote: I do feel the echo cancellation does need some work. Currently, other than listening to users, there is no way to benchmark or trouble shoot echo problems. We find that 2 to 3 out of every 20 calls will experience echo. While echo is a problem that naturally occurs from SIP - PSTN and vice versa, I am still baffled by the fact that the cancellation works randomly. snip ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Echo Cancellation Feature
We have three Cisco 7940 SIP phones and 1 POTS phone connected to our * server with TDM10B fxs card. Our * server is connected to the pstn with 3 X100P cards. We have similar echo problems but only on our SIP phones. We do not have any echo problems with the POTS phone. We just purchased a Polycom IP 500 SIP phone to test but I expect similar echo problems. Don't expect the IP 500's to do anything as you stated, we are using these now and are having the problem I described earlier with these phones. - B ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Echo Cancellation Feature
The single most usefull tool that anyone outside telco consultants is likely to have is ztmonitor. If you do a ztmonitor [channel number] -v you will get a visual of the sound strengths and it's pretty easy to see when rx or tx are out of balance... Now, if only that would help fix the low-level static noise I have on the x100p, that would be great. Chris. On Thu, 22 Apr 2004, Rich Adamson wrote: I do feel the echo cancellation does need some work. Currently, other than listening to users, there is no way to benchmark or trouble shoot echo problems. Sure there are, it's just that 99% of the asterisk implementors don't have the test equipment to do it, and a good share probably wouldn't know how to do it if they had access to the equipment. We find that 2 to 3 out of every 20 calls will experience echo. While echo is a problem that naturally occurs from SIP - PSTN and vice versa, I am still baffled by the fact that the cancellation works randomly. When doing a zap show channel X, it will also report that the cancellation is still on. We experience the most echo with a T100P -- Adtran TA 750 FXO modules. While I understand these do not have impedence matching, I wonder to myself why echo cancellation works sometimes, and others not. Looking at Network util, processor util, and memory utilization, they do not provide any clear indication as to why /when it occurs. Not likely to have any impact whatsoever. Is there anything more that can be done to debug echo cancellation, and further are other users experiencing this random echo. I know it was discussed before, but the support folks at digium aren't able to offer anymore help. You've probably read enough from previous postings to know there are several different locations within an end-to-end voice call where echo can creap into a system. In very general terms, any place where an end-to-end channel incures a two-wire to four-wire conversion (whether done in hardware or software), echo can creap in due to lots of different reasons. Since asterisk provides us with lots of configuration choices, hardly any two systems are alike. Therefore, don't know that anyone is going to write * code anytime soon to correct something that can't be pointed to, etc. Someone mentioned they have echo on sip to sip calls (presumably the call was processed by a single * system). If they do, the problem is likely in the sip phone as there are no echo cancallation needs in that four-wire end-to-end call from an * perspective. I've got a fair amount of test equipment (and 20+ years telephony background), and am planning to assemble a document identifying some of the pstn issues, level settings, and other things impacting a reasonable system implementation. Unless someone wants to UPS a transmission test set to me quickly, the document won't be completed for several weeks. (The only test set I have access to will not be released for a couple of weeks due to classes, etc.) I'm also expecting these tests to point out a number of other transmission issues within asterisk that we'll get documented with real numbers, etc. Rich -- chris maresca senior partner - www.olliancegroup.com linux, up 17 days ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Echo Cancellation Feature
I've got a really cheap analog phone connected to a Sipura SIP adaptor, and have zero echo problems... Just static problems, but it may be related. Chris. On Thu, 22 Apr 2004, Brent Franks wrote: We have three Cisco 7940 SIP phones and 1 POTS phone connected to our * server with TDM10B fxs card. Our * server is connected to the pstn with 3 X100P cards. We have similar echo problems but only on our SIP phones. We do not have any echo problems with the POTS phone. We just purchased a Polycom IP 500 SIP phone to test but I expect similar echo problems. Don't expect the IP 500's to do anything as you stated, we are using these now and are having the problem I described earlier with these phones. - B -- chris maresca senior partner - www.olliancegroup.com linux, up 17 days ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
