Re: [Asterisk-Users] Fine Tuning

[Andrei (MPI)]

Peter Osborne wrote:
On Tuesday 07 December 2004 12:34, Steven Critchfield wrote:
 

On Tue, 2004-12-07 at 11:00 -0500, Peter Osborne wrote:
   

Hello all,
We've been using our Asterisk system live for about a month now and I'm
looking to tuning a few things. First, is echo, I receive a fair amount
of echo during the first 10-15 seconds of incoming calls.
     

Care to mention what PSTN hardware you are using?
   

I'm using a Digium TDM400, 4 FXO's but we actually only have 3 incoming lines, 
we don't have any VOIP carriers, we only use IP internally.
 

Pete,
I have similar config (TDM/4 FXO + Polycoms 500-600). My PSTN echo 
almost disappeared with the following settings:

zapata.conf:
echocancel=64
echocancelwhenbridged=yes
/usr/src/zaptel/zconfig.h
...
#define ECHO_CAN_MARK2
....
#define AGGRESSIVE_SUPPRESSOR
Using latest development Asterisk&zaptel from CVS.
Your mileage may vary.
Sincerely,
Andrei
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