[Asterisk-Dev] IAX to zaptel echo

[Claude Klimos]

Hi all,
 
I am experiencing a problem with the quality of the voice communication
between an IAX based softphone (WinIAX) and an outside line through a
FXO port or even with a regular analog phone connected to a FXS port.
The party using the IAX softphone hears his own echo a plit of a second
after speaking. The party on the analog end does not experience any
echo. I tried to modify the KFLAG parameter in the Makefile of zaptel to
change the algorithm without results. I also tried to modify the value
of the echocancel paramter in zapata.conf (tried 32,64,yes/128,256)
without success. Note the parameter echocancelwhenbridged is set to yes.
 
On the other hand, when I establish a communication between two IAX
softphones, I hear no echo. This leads me to suspect the cards I am
using. I have one X100P and one TDM400P card with 2 modules enabled.
 
I would like to know if anyone encoutered this problem and how to
minimize/eliminate the echo, if possible. Also, we will eventually be
using a PRI with a T100P or a T400P, would the echo problem still be
present?
 
Regards,
 
Claude Klimos
 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.digium.com/pipermail/asterisk-dev/attachments/20030820/f5f77e11/attachment.htm