Re: [asterisk-users] Background noise
Hi! so after using the sip show channels commands i can see that most of the the communication are under ulaw format and one or two are under gsm, do you guys know a way to force the system to use only ulaw, is it a good idea and is it gonna solve my static noise issue? actually, the caller and the called hear the static noise just when handset is used, once i use the speaker it's gone. actual situation: -once i use the handset to dial i can here the noise. -i have the same model polycom phone configured with another server (asterisk 1.4), and guess what no noise at all. any guess! 2010/3/27 khalid touati khalidtou...@gmail.com Thank you very mutch Philip, i'll use these commands and get back with the output. 2010/3/26 Philipp von Klitzing klitz...@pool.informatik.rwth-aachen.de Hi! it should be some commands that can give me a better idea about the codecs, if anyone know them, please help! Use sip show channels and iax show channels and look at the Format column. About the Polycom devices: Others will have to help you there. I have no good guess why you might have the issue only on speakerphone, but not in handset mode. Could it maybe be some kind of electrical grounding issue (instead of something caused by transcoding)? Philipp -- _ -- 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 -- Abdullah -- Abdullah -- _ -- 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] Background noise
i have the same model polycom phone configured with another server (asterisk 1.4), and guess what no noise at all. any guess! Replace the handset? -- _ -- 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] Background noise
:) all users are having the same issue, even those connected to this server from abroad! 2010/3/29 Philipp von Klitzing klitz...@pool.informatik.rwth-aachen.de i have the same model polycom phone configured with another server (asterisk 1.4), and guess what no noise at all. any guess! Replace the handset? -- _ -- 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 -- Abdullah -- _ -- 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] Background noise
Khalid- :) all users are having the same issue, even those connected to this server from abroad! Since you have an identical working system, why are you not able to debug this? First swap the phone... then swap any cards in the server, then servers, then check carefully software differences etc. You should be able to isolate one thing that makes a difference, then you can zero in on that. So far your questions are general and you can't give a specific problem definition other than background noise which is a general thing that happens with radios, TVs, cars, parties, movies, etc -- not just Asterisk :-) So it's difficult for group members to give you advice. Also suggest to not cut text from previous posts... most of your thread is missing below. -Jeff 2010/3/29 Philipp von Klitzing klitz...@pool.informatik.rwth-aachen.de i have the same model polycom phone configured with another server (asterisk 1.4), and guess what no noise at all. any guess! Replace the handset? -- _ -- 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] Background noise
Thank you very mutch Philip, i'll use these commands and get back with the output. 2010/3/26 Philipp von Klitzing klitz...@pool.informatik.rwth-aachen.de Hi! it should be some commands that can give me a better idea about the codecs, if anyone know them, please help! Use sip show channels and iax show channels and look at the Format column. About the Polycom devices: Others will have to help you there. I have no good guess why you might have the issue only on speakerphone, but not in handset mode. Could it maybe be some kind of electrical grounding issue (instead of something caused by transcoding)? Philipp -- _ -- 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 -- Abdullah -- _ -- 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] Background noise
Hi Philip, So i looked at the codecs in the device (polycom) it says only G.711 and ulaw can be used, i made an internal call using two phones that are configured just with sip (so IAX not involved) but the static noise is there, i typed show sip peer username and this is the only thing i got: Codecs : 0x8000e (gsm|ulaw|alaw|h263) Codec Order : (none) it should be some commands that can give me a better idea about the codecs, if anyone know them, please help! 2010/3/25 Philipp von Klitzing klitz...@pool.informatik.rwth-aachen.de Hi! i have recently connected my (working) asterisk 1.2 server, with two 1.4 asterisk servers (one using SIP the other using IAX), since then (i believe) people starts complaining about a high background noise The best idea is probably to start out by looking at the codecs. If you happen to have either gsm or g726 somewhere along your media path then I would strongly suggest you start to get rid of them so see if that eliminates the issue. g726 is one big mess, and gsm had some compiler issues in the past. The next thing to look at is if the issue only appears when IAX is involved. Maybe looking at the Polycom firmware, and release notes in particular (no clue how detailed those are), would also be a good idea. Philipp -- _ -- 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 -- Abdullah -- _ -- 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] Background noise
Hi! it should be some commands that can give me a better idea about the codecs, if anyone know them, please help! Use sip show channels and iax show channels and look at the Format column. About the Polycom devices: Others will have to help you there. I have no good guess why you might have the issue only on speakerphone, but not in handset mode. Could it maybe be some kind of electrical grounding issue (instead of something caused by transcoding)? Philipp -- _ -- 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
[asterisk-users] Background noise
Hi Guys, i have recently connected my (working) asterisk 1.2 server, with two 1.4 asterisk servers (one using SIP the other using IAX), since then (i believe) people starts complaining about a high background noise when using the handset on Polycom phones (but when using the speaker it's fine, and i noticed that my self), my question is, can anybody tell me any step to begin diagnosing the issue, to be honest i don't know from where to begin!! -- Abdullah -- _ -- 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] Background noise
Hi! i have recently connected my (working) asterisk 1.2 server, with two 1.4 asterisk servers (one using SIP the other using IAX), since then (i believe) people starts complaining about a high background noise The best idea is probably to start out by looking at the codecs. If you happen to have either gsm or g726 somewhere along your media path then I would strongly suggest you start to get rid of them so see if that eliminates the issue. g726 is one big mess, and gsm had some compiler issues in the past. The next thing to look at is if the issue only appears when IAX is involved. Maybe looking at the Polycom firmware, and release notes in particular (no clue how detailed those are), would also be a good idea. Philipp -- _ -- 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
[asterisk-users] background noise
Hi all, I would like to know how can I immunize the background noise in my case. Anyone can help? I have adjusted txgain rxgain in different value but the result is the same. ango Below is my configuration. asterisk1.4.21.1 zaptel1.4.11 addon1.4.7 TDM400 (FXOx4) There is a very large background noise when a call from sip to PSTN. Below is the test case. A - sip phone B - PSTN case 1: result is normal caller A1 callee A2 case 2: A hears B is ok but A hears much background noise from his/her area when A say nothing. The sound volume of A is very low when B hears A. caller A callee B case 3: same as case 2 caller B callee A ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Background Noise Elimination
On Jan 7, 2008, at 6:19 PM, Matt Riddell wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Norman Franke wrote: Greetings! We have a somewhat noisy background in our call center, and I'd like to reduce this. Obviously, we could plaster the walls with sound absorbing material, but is there anything we can do in software either using any algorithms for our open source-based SIP library or inside Asterisk itself? Related to this, anyone have a good source for good panels? We are using Plantronics noise canceling headsets, which don't really seem to work all that well. Our ancient system handled noise much better, but I suspect that was partly due to the Dialogic ADPCM algorithm used that just reduced the intelligibility of lower volume noises in general. We are using PCMU direct from the agent's mic to through Asterisk to PRIs, so we don't suffer from compression artifacts. The down side, is that you can make out even very quiet conversations in the background (like 3 agents to one side.) How have people handled this? I'm experimenting with a noise gate that will lower the volume when the agent isn't talking, but that won't help when the agent is talking. Nah, there's nothing really. The noise gate is your best bet. I would assume that while an agent is talking the customer will be listening to the agent, so the background noise will hardly be noticeable. The issue is, while two people are talking its pretty hard to remove just one of them from a wave file. Try the noise gate and see how you go. Oh, you might want to try a downwards expander instead (a noise gate but with ratio as well as threshold). We have an IP600 located in our colo, a very noisy environment. For a spooky experience make a phone call and pass the call through a Ditech audio processor in the path of the PRIs. You will hear no background noise. You can even use the speakerphone. Even Polycom to Polycom is not too bad. But an all IP path to anything else and you cant hardly hear the other person. ___ --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
[asterisk-users] Background Noise Elimination
Greetings! We have a somewhat noisy background in our call center, and I'd like to reduce this. Obviously, we could plaster the walls with sound absorbing material, but is there anything we can do in software either using any algorithms for our open source-based SIP library or inside Asterisk itself? Related to this, anyone have a good source for good panels? We are using Plantronics noise canceling headsets, which don't really seem to work all that well. Our ancient system handled noise much better, but I suspect that was partly due to the Dialogic ADPCM algorithm used that just reduced the intelligibility of lower volume noises in general. We are using PCMU direct from the agent's mic to through Asterisk to PRIs, so we don't suffer from compression artifacts. The down side, is that you can make out even very quiet conversations in the background (like 3 agents to one side.) How have people handled this? I'm experimenting with a noise gate that will lower the volume when the agent isn't talking, but that won't help when the agent is talking. Norman Franke ASD, Inc. ___ --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] Background Noise Elimination
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Norman Franke wrote: Greetings! We have a somewhat noisy background in our call center, and I'd like to reduce this. Obviously, we could plaster the walls with sound absorbing material, but is there anything we can do in software either using any algorithms for our open source-based SIP library or inside Asterisk itself? Related to this, anyone have a good source for good panels? We are using Plantronics noise canceling headsets, which don't really seem to work all that well. Our ancient system handled noise much better, but I suspect that was partly due to the Dialogic ADPCM algorithm used that just reduced the intelligibility of lower volume noises in general. We are using PCMU direct from the agent's mic to through Asterisk to PRIs, so we don't suffer from compression artifacts. The down side, is that you can make out even very quiet conversations in the background (like 3 agents to one side.) How have people handled this? I'm experimenting with a noise gate that will lower the volume when the agent isn't talking, but that won't help when the agent is talking. Nah, there's nothing really. The noise gate is your best bet. I would assume that while an agent is talking the customer will be listening to the agent, so the background noise will hardly be noticeable. The issue is, while two people are talking its pretty hard to remove just one of them from a wave file. Try the noise gate and see how you go. Oh, you might want to try a downwards expander instead (a noise gate but with ratio as well as threshold). - -- Kind Regards, Matt Riddell Director ___ http://www.venturevoip.com (Great new VoIP end to end solution) http://www.venturevoip.com/news.php (Daily Asterisk News - html) http://www.venturevoip.com/newrssfeed.php (Daily Asterisk News - rss) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.7 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFHgsGBDQNt8rg0Kp4RAuAeAKCDTdW2NUxyB4WR/V1eViDjrf3wmQCfXgdj 1zvwENF3d23ASR+JzxueKm8= =r4xF -END PGP SIGNATURE- ___ --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] Background Noise
Just to add some info from recent experience. May help, May not 1 X100P 2 X 4 port TDM400P Had to hook a dial-in palm PDA base for a custom software implementation to my * system and have the modem dial out and work properly. Phone connects to second port on PDA Base Experienced very bad electrical type noise on the line, hum, buzz, fad in and out. would come and go. Switched ports, wires, rxgain and txgain changes, phone changes, nothing helped the PDA base is also connected via serial port (or USB did not matter) to desktop computer for sync purposes Through trial and error. Found noise coming from connection to desk top computer. On, Off did not matter. Resolution. The power strip surge protector I was using on the desktop computer has two modes for noise filtration built in. 75 Hertz (or something, don;t remember) and 50 Hertz. I moved the plug for the desktop from the 75 side to the 50 side, All noise on line now gone. Not sure if this helps, constant noise on all sides may be power and noise filtration related... --- [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi All i have some background noise problem with * and a diva srv 4bri + chan_capi 0.3.0 + X-Ten PRO on my pc. Both in incoming and outgoing call have a background noise. there is some tuning to do? where can i find documentation about capi.conf? which is the best codec for sip (ulaw, alaw, gsm...)? mark ___ 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 __ Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it! http://webhosting.yahoo.com/ps/sb/ ___ 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] Background Noise
yes, power is also source of background noise, but not all the time. you must also have proper grounding. with pc-phone, it could also be related to your phone/speaker gain controls. so u have to be definite on what kind of background noise u are getting. best codec for sip? it's always best to have alaw or ulaw. :) but bw-consuming. alaw is if u are using E1s. ulaw for T1s. don't even bother to use gsm. better get g729. some says u can use g723.1 with * w/o add'l purchase of license or something.. but i couldn't make this codec work. (so i went for g729.. :) ) im testing its quality though as digium cards are using CPUs as DSPs. - Original Message - From: Jonathan Biggs [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, January 22, 2004 11:01 AM Subject: Re: [Asterisk-Users] Background Noise Just to add some info from recent experience. May help, May not 1 X100P 2 X 4 port TDM400P Had to hook a dial-in palm PDA base for a custom software implementation to my * system and have the modem dial out and work properly. Phone connects to second port on PDA Base Experienced very bad electrical type noise on the line, hum, buzz, fad in and out. would come and go. Switched ports, wires, rxgain and txgain changes, phone changes, nothing helped the PDA base is also connected via serial port (or USB did not matter) to desktop computer for sync purposes Through trial and error. Found noise coming from connection to desk top computer. On, Off did not matter. Resolution. The power strip surge protector I was using on the desktop computer has two modes for noise filtration built in. 75 Hertz (or something, don;t remember) and 50 Hertz. I moved the plug for the desktop from the 75 side to the 50 side, All noise on line now gone. Not sure if this helps, constant noise on all sides may be power and noise filtration related... --- [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi All i have some background noise problem with * and a diva srv 4bri + chan_capi 0.3.0 + X-Ten PRO on my pc. Both in incoming and outgoing call have a background noise. there is some tuning to do? where can i find documentation about capi.conf? which is the best codec for sip (ulaw, alaw, gsm...)? mark ___ 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 __ Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it! http://webhosting.yahoo.com/ps/sb/ ___ 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
[Asterisk-Users] Background Noise
Hi All i have some background noise problem with * and a diva srv 4bri + chan_capi 0.3.0 + X-Ten PRO on my pc. Both in incoming and outgoing call have a background noise. there is some tuning to do? where can i find documentation about capi.conf? which is the best codec for sip (ulaw, alaw, gsm...)? mark ___ 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] Background Noise
Has anyone had any issues with background noise while using a TDM400 card? If so, what things did you tweak to resolve the issue? My * server has a single TDM400 card (2 ports enabled) with two X100P cards. Any feedback would be greatly appreciated. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Background Noise
bottom response = on On Thu, 2003-08-21 at 15:17, [EMAIL PROTECTED] wrote: Has anyone had any issues with background noise while using a TDM400 card? If so, what things did you tweak to resolve the issue? My * server has a single TDM400 card (2 ports enabled) with two X100P cards. Any feedback would be greatly appreciated. Jeff, Yes. How powerful is the power supply in your computer? How old? We had the problem in some Compaq Proliant PII 233s w/ 240 watt supplies but not in more recent hardware. This is a known problem to digium and the next batch of TDM400 cards are supposed to fix the problem in mid to late September. Howard White ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Background Noise
Hi Howard, My * server has a brand new 350 watt power supply. After your message, I did confirm with Digium that the next batch of TDM400 cards is supposed to resolve the issue. Thank you for all your assistace. Jeff Gunther [EMAIL PROTECTED] wrote on 08/21/2003 04:20:16 PM: bottom response = on On Thu, 2003-08-21 at 15:17, [EMAIL PROTECTED] wrote: Has anyone had any issues with background noise while using a TDM400 card? If so, what things did you tweak to resolve the issue? My * server has a single TDM400 card (2 ports enabled) with two X100P cards. Any feedback would be greatly appreciated. Jeff, Yes. How powerful is the power supply in your computer? How old? We had the problem in some Compaq Proliant PII 233s w/ 240 watt supplies but not in more recent hardware. This is a known problem to digium and the next batch of TDM400 cards are supposed to fix the problem in mid to late September. Howard White ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
