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. 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. 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. Asterisk is truly a great piece of open soruce software, and I commend the authors/contributors for their hardware and attention to detail. We're just a few items a way from making this thing absolutely kill the traditional PBX market :). Long live Asterisk, Brent On Thu, 22 Apr 2004, David J Carter wrote: > I have my RX at 4.0 ant TX at 8.0, > I get slight echo for the first 5-6 seconds then all OK. > > > Regards > > Dave > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Chris Stenton > Sent: 22 April 2004 17:07 > To: [EMAIL PROTECTED] > Subject: [Asterisk-Users] inbound calls better quality than outbound > calls on X100P > > > I have a strange problem in that when I receive a call through the X100P > which is forwarded to my budgetone 100 then the voice quality is perfect > both directions. However, if I make a call out from the budgetone to the > same caller via the X100P the sound level is a lot lower and the quality a > lot poorer. I've had to set the rx tx gain to 1.5 or I can hardly hear at > all. > > Any ideas what is wrong, I'm using the latest zaptel and asterisk from the > cvs head as of today. > > > Chris > > > _______________________________________________ > 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 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