Re: [asterisk-users] hardware echo cancellation
If I get an echo cancellation module for my Digium TE121 card, will I need to do any adjustments/configuration in Asterisk? You should probably still set the gain using rxgain and txgain. IME, it's much easier setting gains on a PRI than it is on a POTS line, though. I've worked with a couple of PRIs that need no adjustments at all. Is the hardware better than the software version? The hardware version is the same algorithm as the HPEC echo canceler. It's quite a bit better than the MG2 algorithm that comes free with asterisk and maybe slightly better than OSLEC. The convergence time of the hardware algorithm is pretty fast (time it takes for the EC to effectively get rid of echo on a call). FYI: If you're considering running the software-based HPEC for all channels on a T1/E1, you should use a reasonably fast machine, as it uses quite a bit of CPU. That's one big reason to get the hardware module. - Noah TIA! ___ -- 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
[asterisk-users] hardware echo cancellation
I got a few newbie questions. If I get an echo cancellation module for my Digium TE121 card, will I need to do any adjustments/configuration in Asterisk? Is the hardware better than the software version? TIA! ___ -- 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] hardware echo cancellation for TDM card
Hi Just checking, Is there any hardware echo cancellation card available for the digium TDM400P card I read the archives and could not find any. I think I need the TDM2400 card for this Thanks Patrick ___ --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] hardware echo cancellation for TDM card
On 12/14/05, Patrick Fortin [EMAIL PROTECTED] wrote: Hi Just checking, Is there any hardware echo cancellation card available for the digium TDM400P card I read the archives and could not find any. I think I need the TDM2400 card for this No. Not at this time. You will need indeed need the TDM2400 series if you'd like hardware echo cans. -- 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] hardware echo cancellation for TDM card
Patrick Fortin wrote: Is there any hardware echo cancellation card available for the digium TDM400P card No. Software echo cancellation is fine for small density applications like 4-8 ports, unless you are using a very low performance CPU. ___ --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
[Asterisk-Users] hardware echo cancellation. sangoma?
I have been reassigned from my normal duties to figure out the asterisk echo problems we have been experiencing. We currently use a TE110P card (I think.) I know that the problem is the worst when calling from our office to a residential analog line or a analog PBX. Occasionally the problem will appear when calling anther digital PBX. The Asterisk Guru who just left my company mentioned that there is a Sangoma card that can help with the echo and he gave me the name of David Mandelstam. So David, if you are listening, I would appreciate your thoughts or advice. If anyone else has some great ideas, they would be appreciated too. Thanks, Andy Goss -- H. Andy Goss Network Engineer Network Advocates Inc. Main: 502.412.1050 DID: 502.992.5933 Mobile: 502.387.8216 [EMAIL PROTECTED] ___ --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] hardware echo cancellation. sangoma?
We are using sangoma quad card with 4 E1 hooked, no echo problems. Best Regards Matt - Original Message - From: Andy Goss [EMAIL PROTECTED] To: Asterisk Users Mailing List - Non-Commercial Discussion asterisk-users@lists.digium.com Sent: Friday, October 07, 2005 2:45 PM Subject: [Asterisk-Users] hardware echo cancellation. sangoma? I have been reassigned from my normal duties to figure out the asterisk echo problems we have been experiencing. We currently use a TE110P card (I think.) I know that the problem is the worst when calling from our office to a residential analog line or a analog PBX. Occasionally the problem will appear when calling anther digital PBX. The Asterisk Guru who just left my company mentioned that there is a Sangoma card that can help with the echo and he gave me the name of David Mandelstam. So David, if you are listening, I would appreciate your thoughts or advice. If anyone else has some great ideas, they would be appreciated too. Thanks, Andy Goss -- H. Andy Goss Network Engineer Network Advocates Inc. Main: 502.412.1050 DID: 502.992.5933 Mobile: 502.387.8216 [EMAIL PROTECTED] ___ --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 ___ --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] hardware echo cancellation. sangoma?
Sangoma did announce a quad T1/E1 card with hardware echo-cancellation a couple months ago. I believe they will start shipping it in the next few weeks. There should be more info on their website including contact information: http://www.sangoma.com MATT--- On 10/7/05, Matt [EMAIL PROTECTED] wrote: We are using sangoma quad card with 4 E1 hooked, no echo problems.Best RegardsMatt- Original Message -From: Andy Goss [EMAIL PROTECTED] To: Asterisk Users Mailing List - Non-Commercial Discussionasterisk-users@lists.digium.comSent: Friday, October 07, 2005 2:45 PM Subject: [Asterisk-Users] hardware echo cancellation. sangoma? I have been reassigned from my normal duties to figure out the asterisk echo problems we have been experiencing.We currently use a TE110P card (I think.) I know that the problem is the worst when calling from our office to a residential analog line or a analog PBX.Occasionally the problem will appear when calling anther digital PBX. The Asterisk Guru who just left my company mentioned that there is a Sangoma card that can help with the echo and he gave me the name of David Mandelstam.So David, if you are listening, I would appreciate your thoughts or advice.If anyone else has some great ideas, they would be appreciated too. Thanks, Andy Goss -- H. Andy Goss Network Engineer Network Advocates Inc. Main: 502.412.1050 DID: 502.992.5933 Mobile: 502.387.8216 [EMAIL PROTECTED] ___ --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___--Bandwidth and Colocation sponsored by Easynews.com -- Asterisk-Users mailing listAsterisk-Users@lists.digium.comhttp://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --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] hardware echo cancellation. sangoma?
Andy - The Sangoma echo can has a longer MS duration of tail (buffer/compensation) than the Digium. Cory Andrews Senior Partner +++ VOIPSupply.com 454 Sonwil Drive Buffalo, NY 14225 +++ voice - 716.630.1555 X22 email - [EMAIL PROTECTED] fax - 716.630.1548 Andy Goss wrote: I have been reassigned from my normal duties to figure out the asterisk echo problems we have been experiencing. We currently use a TE110P card (I think.) I know that the problem is the worst when calling from our office to a residential analog line or a analog PBX. Occasionally the problem will appear when calling anther digital PBX. The Asterisk Guru who just left my company mentioned that there is a Sangoma card that can help with the echo and he gave me the name of David Mandelstam. So David, if you are listening, I would appreciate your thoughts or advice. If anyone else has some great ideas, they would be appreciated too. Thanks, Andy Goss -- H. Andy Goss Network Engineer Network Advocates Inc. Main: 502.412.1050 DID: 502.992.5933 Mobile: 502.387.8216 [EMAIL PROTECTED] ___ --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 ___ --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
[Asterisk-Users] Hardware echo cancellation
Anybody using hardware echo cancelers a PRI at a time ? What did you use ? How much did they cost ? Where'd you get em. Tell us about them ! 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
Re: [Asterisk-Users] Hardware echo cancellation
Alan Bunch wrote: Anybody using hardware echo cancelers a PRI at a time ? What did you use ? How much did they cost ? Where'd you get em. Tell us about them ! I'm playing around with the Tellabs echo canceler. Nothing to report yet. ___ 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] Hardware echo cancellation
Anybody using hardware echo cancelers a PRI at a time ? What did you use ? How much did they cost ? Where'd you get em. After searching for what felt like forever, I finally found a single PRI echo canceller. It is made by ValiantCom, who I believe is based out of India. I installed my first one about 3 weeks ago and so far it is working great. I have over 30 offices on the east coast, and was experiencing horrible echo problems on every call to several of our smaller offices. We also experienced what seemed like random cases of occassional echo to other numbers. Since installing the HW canceller I have not had a single case of echo. In addition to voice, we use asterisk to receive faxes over the PRI and (as long as the echo canceller is set to unidirectional mode) that also continues to work well. The echo cancellers cost around $1000. If anyone is interested, contact me off-list and I will give you the contact information for the US distributor I have been purchasing them through. I don't mean to breach list etiquette too badly, but on a related subject: I now have a Tellabs 255D shelf with 16 2572 cards, and a Tellabs 81-8007 10Amp power supply that I don't need. I never had the time to hook them all up, but as far as I know it all works fine. I have a punch down block and the amphenol cables to go with it, but don't have the wire to connect between the power supply and shelf. I intend to put them on ebay when I have a chance, but if anyone is interested now feel free to make an offer. Eric ___ 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
