[Asterisk-Users] YET Another echo issue PRI CARD Any help acc epted :-)

[Michael D Schelin]

I have found that the audio is hot from some carriers and low on others. 
I have found that this is causing the echocanclers problems. Before I 
reduce it down by 3db I will see if some of the problem in in the Supura .


Andrew Kohlsmith wrote:

> On May 26, 2005 01:58 pm, Colin Anderson wrote:
> 
>>I have had good success fiddling with the txgain and rxgain values in
>>zapata.conf on my PRI. In my setup, cranking the gain down a LOT eliminated
>>most of the echo, and training the users to turn down the gain on their
>>handsets did the rest. It's true, with a PRI, that gains are cranked across
>>the board. Turning the gain down solves a lot of echo problems, with
>>negligible effect on voice quality.
> 
> 
> There should be *NO* reason to adjust tx/rxgain on a PRI or ANY digital 
> connection!  The fact that adjusting it down 10% worked suggests that the 
> telco switch is boosting the signal for some unknown reason.  Use the 
> technique outlined in this message:
> 
> http://lists.digium.com/pipermail/asterisk-users/2004-November/071301.html
> 
> (It works VERY well and is very straightforward, thank you Kris, I reference 
> this all the time!)
> 
> Again if you're screwing with gains on PRI you have bigger problems, I think.
> 
> -A.
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