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Hello everybody,
I am sorry to bring this up again if this
kind of echo issue has ever discussed.
Phone2 in below call path experiences quite
annoying echo:
Phone1 --> FXS (TDM400P) --> Asterisk
--> SIP GW --> PSTN --> Phone2
It is annoying as on phone2, we can hear
the whole words we say with the level of maybe 25% of the original sound. I can
reduce the echo to maximum with the following settings for my FXS port on
zapata.conf:
rxgain=-8.0
txgain=2.0 echocancel=256 echotraining=500 But it is still not entirely
eliminated as we still sometimes hear the last syllables, with the level
of maybe 5% of the original sound.
What I did was just playing around with the
values of those parameters, use ztmonitor to have the FXS rx/tx
signal visualised and use only my ears to check it. I think my ears are
fine :), as I do this because my friends complain about the echo they
hear.
Does anybody know a better method
to find the best value for those parameters?
There is no echo on phone2 when
I use softphone like this:
PC(X-Lite) --> Asterisk --> SIP GW
--> PSTN --> Phone2 The following is the version of asterisk I
am using:
CLI> show version
Asterisk SVN-branch-1.2-r7999 built by root
@ atvie-asterisk on a i686 running Linux on 2006-01-13 06:15:02 UTC
And I set the echo canceller in zconfig.h
to ECHO_CAN_MG2.
Cheers,
Anto
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