Hi, I have TE406P (2nd gen card with echo cancellation on-board). We still notice quite often echo on our PBX that is connected to one of the spans on TE406P (with calls routers to PRI provider on another span). I've tried to experiment with the echo cancellation on asterisk. I enabled echo cancellation in Zapata.conf to see if I can improve the situation and users started reporting "warping bubble" (description I got from one of the users) sound on calls from PABX->Asterisk->PRI (and other way). I was expecting that asterisk would disable its echo cancellation once it find on-board module. The strange thing I noticed that after system reboot things are now better. Although I cannot say for sure because the system was ever rebooted 2 times. Can anyone shed some light on this? Has anyone had similar problems? Or point me into right direction for troubleshooting? Regards Boris
Kevin P. Fleming
2005-Oct-27 19:06 UTC
[Asterisk-Users] Echo canceller on TE406 & Asterisk
Boris Bakchiev wrote:> I enabled echo cancellation in Zapata.conf to see if I can improve the > situation and users started reporting "warping bubble" (description I > got from one of the users) sound on calls from PABX->Asterisk->PRI (and > other way). > > I was expecting that asterisk would disable its echo cancellation once > it find on-board module.If you have 'echocancel=no' in zapata.conf, then there is no echo cancellation, software or hardware. If you have 'echocancel=yes', then there is echo cancellation. If you have hardware available, it will use it, otherwise it will be done in software. I suspect you had the hardware echo canceller disabled without realizing it.
I replaced a TE410P (1st Gen) with a TE411P (2nd gen with hardware echo canceller) and the echo actually got much worse! Very disappointing! On 10/28/05, Boris Bakchiev <boris@jildent.com.au> wrote:> > Hi, > > I have TE406P (2nd gen card with echo cancellation on-board). > We still notice quite often echo on our PBX that is connected to one of > the spans on TE406P (with calls routers to PRI provider on another > span). > > I've tried to experiment with the echo cancellation on asterisk. > > I enabled echo cancellation in Zapata.conf to see if I can improve the > situation and users started reporting "warping bubble" (description I > got from one of the users) sound on calls from PABX->Asterisk->PRI (and > other way). > > I was expecting that asterisk would disable its echo cancellation once > it find on-board module. > > The strange thing I noticed that after system reboot things are now > better. > Although I cannot say for sure because the system was ever rebooted 2 > times. > > Can anyone shed some light on this? Has anyone had similar problems? > Or point me into right direction for troubleshooting? > > Regards > Boris > > _______________________________________________ > --Bandwidth and Colocation sponsored by Easynews.com <http://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 >-------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20051027/140a8716/attachment.htm
Hi Kevin, Thanks for your reply. That probably what it was. :) Could echo cancellation on PBX conflict with VPM module and create the "warping babble" sound that my users are reporting? Do echocancelwhenbridged and echotraining do anything when VPM module is used? Should I be using them? Regards> > I was expecting that asterisk would disable its echo cancellationonce> > it find on-board module. > > If you have 'echocancel=no' in zapata.conf, then there is no echo > cancellation, software or hardware. > > If you have 'echocancel=yes', then there is echo cancellation. If you > have hardware available, it will use it, otherwise it will be done in > software. > > I suspect you had the hardware echo canceller disabled withoutrealizing> it.
I've had similar problems with no fix. -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Boris Bakchiev Sent: Thursday, October 27, 2005 10:02 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: [Asterisk-Users] Echo canceller on TE406 & Asterisk Hi, I have TE406P (2nd gen card with echo cancellation on-board). We still notice quite often echo on our PBX that is connected to one of the spans on TE406P (with calls routers to PRI provider on another span). I've tried to experiment with the echo cancellation on asterisk. I enabled echo cancellation in Zapata.conf to see if I can improve the situation and users started reporting "warping bubble" (description I got from one of the users) sound on calls from PABX->Asterisk->PRI (and other way). I was expecting that asterisk would disable its echo cancellation once it find on-board module. The strange thing I noticed that after system reboot things are now better. Although I cannot say for sure because the system was ever rebooted 2 times. Can anyone shed some light on this? Has anyone had similar problems? Or point me into right direction for troubleshooting? Regards Boris _______________________________________________ --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
I have similar problems with performance degradation over time. I'm about to post another message to the list (once I have some more information). Stay tuned. =========================================Rod Bacon Empowered Communications Ground Floor, 102 York St. South Melbourne Victoria, Australia. 3205 Phone: +613 99401600 Fax: +613 99401650 FWD: 512237 ICQ: 5662270 ========================================= Boris Bakchiev wrote:> Hi, > > I have TE406P (2nd gen card with echo cancellation on-board). > We still notice quite often echo on our PBX that is connected to one of > the spans on TE406P (with calls routers to PRI provider on another > span). > > I've tried to experiment with the echo cancellation on asterisk. > > I enabled echo cancellation in Zapata.conf to see if I can improve the > situation and users started reporting "warping bubble" (description I > got from one of the users) sound on calls from PABX->Asterisk->PRI (and > other way). > > I was expecting that asterisk would disable its echo cancellation once > it find on-board module. > > The strange thing I noticed that after system reboot things are now > better. > Although I cannot say for sure because the system was ever rebooted 2 > times. > > Can anyone shed some light on this? Has anyone had similar problems? > Or point me into right direction for troubleshooting? > > Regards > Boris > > _______________________________________________ > --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 > >