[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