Hello, We just had some new T1s turned up today to replace others that our contract has run out on and we are now getting more echo on the new T1 lines than we had on the old ones. The T1 type is 24-channel, D4/AMI SF Robbed-bit(the same as the T1s they replaced) The problem is that we are getting echo on about 10% of the calls in and out placed on these new T1s compared to less than 1% with echos on the old T1s. I was wondering if anyone with T1s or E1s is using echotraining=yes. All the info on echotraining I've found seems to involve POTS lines not T1s. Also, how much of a pause is made when using echotraining? Here are my current zapata.conf settings for the T1s: [channels] group=1 language=en signalling=em_w usecallerid=yes callerid=asreceived context=default echocancel=yes echocancelwhenbridged=yes rxgain=1.0 txgain=1.0 channel => 1-24 Thanks, MATT---
I don't use T1's, only regular lines, but echotraining works with any zaptel interface as far as I know. I would try echotraining=yes and echotraining=800 (if your using a relatively new CVS version). I personally haven't noticed any "pause" when using echotraining, I think its less then 1 second, but not 100% sure on that. Also, you didn't mention if it was near end echo, or far end echo your hearing. On Wed, 2004-07-21 at 13:24 -0400, mattf wrote:> Hello, > > We just had some new T1s turned up today to replace others that our contract > has run out on and we are now getting more echo on the new T1 lines than we > had on the old ones. > > The T1 type is 24-channel, D4/AMI SF Robbed-bit(the same as the T1s they > replaced) > > The problem is that we are getting echo on about 10% of the calls in and out > placed on these new T1s compared to less than 1% with echos on the old T1s. > > I was wondering if anyone with T1s or E1s is using echotraining=yes. All the > info on echotraining I've found seems to involve POTS lines not T1s. > > Also, how much of a pause is made when using echotraining? > > Here are my current zapata.conf settings for the T1s: > [channels] > group=1 > language=en > signalling=em_w > usecallerid=yes > callerid=asreceived > context=default > echocancel=yes > echocancelwhenbridged=yes > rxgain=1.0 > txgain=1.0 > channel => 1-24 > > Thanks, > > MATT--- > _______________________________________________ > 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-- Mike Benoit <ipso@snappymail.ca>
Hello, Sorry, it's near-end echo Also, I am running Slackware 10.0 with Asterisk CVS from 2004-07-06 on a P4 with a TE405P quad T1 card. Thanks, MATT--- -----Original Message----- From: Mike Benoit [mailto:ipso@snappymail.ca] Sent: Wednesday, July 21, 2004 2:06 PM To: asterisk-users@lists.digium.com Subject: Re: [Asterisk-Users] echotraining on T1 circuits I don't use T1's, only regular lines, but echotraining works with any zaptel interface as far as I know. I would try echotraining=yes and echotraining=800 (if your using a relatively new CVS version). I personally haven't noticed any "pause" when using echotraining, I think its less then 1 second, but not 100% sure on that. Also, you didn't mention if it was near end echo, or far end echo your hearing. On Wed, 2004-07-21 at 13:24 -0400, mattf wrote:> Hello, > > We just had some new T1s turned up today to replace others that ourcontract> has run out on and we are now getting more echo on the new T1 lines thanwe> had on the old ones. > > The T1 type is 24-channel, D4/AMI SF Robbed-bit(the same as the T1s they > replaced) > > The problem is that we are getting echo on about 10% of the calls in andout> placed on these new T1s compared to less than 1% with echos on the oldT1s.> > I was wondering if anyone with T1s or E1s is using echotraining=yes. Allthe> info on echotraining I've found seems to involve POTS lines not T1s. > > Also, how much of a pause is made when using echotraining? > > Here are my current zapata.conf settings for the T1s: > [channels] > group=1 > language=en > signalling=em_w > usecallerid=yes > callerid=asreceived > context=default > echocancel=yes > echocancelwhenbridged=yes > rxgain=1.0 > txgain=1.0 > channel => 1-24 > > Thanks, > > MATT--- > _______________________________________________ > 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-- Mike Benoit <ipso@snappymail.ca> _______________________________________________ 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
sounds like you switched providers. you never know, unless you ask, where/who is really providing the line. example: we ordered a qwest line, it got installed. found out later that the line was actually a MCI line because qwest had nothing available locally, and long-hauled it, placing echo cans inline. (in our case the echo cans worsened the quality and made diagnostics impossible. just food for thought. mattf wrote:> Hello, > > We just had some new T1s turned up today to replace others that our contract > has run out on and we are now getting more echo on the new T1 lines than we > had on the old ones. > > The T1 type is 24-channel, D4/AMI SF Robbed-bit(the same as the T1s they > replaced) > > The problem is that we are getting echo on about 10% of the calls in and out > placed on these new T1s compared to less than 1% with echos on the old T1s. > > I was wondering if anyone with T1s or E1s is using echotraining=yes. All the > info on echotraining I've found seems to involve POTS lines not T1s. > > Also, how much of a pause is made when using echotraining? > > Here are my current zapata.conf settings for the T1s: > [channels] > group=1 > language=en > signalling=em_w > usecallerid=yes > callerid=asreceived > context=default > echocancel=yes > echocancelwhenbridged=yes > rxgain=1.0 > txgain=1.0 > channel => 1-24 > > Thanks, > > MATT--- > _______________________________________________ > 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 >