[Asterisk-Users] SIP and echo cancel

[Cirelle Enterprises]

try separating the values of tx/rx gain in zapata.conf
ex:
txgain= -2.5
rxgain= 10
echocancel=yes
echocancelwhenbridged=yes
echotraining=800

Best Regards

Greg Cirino

CirelleM at iL Virus & Spam Free
and you can't do better than that!
http://www.cirellemail.com

Cirelle Enterprises Inc. 
25 Indian Rock Rd #421
Windham NH, 03087
603-425-2221



Philip Edelbrock wrote:

>
> On Dec 18, 2005, at 12:01 PM, Andrew Kohlsmith wrote:
>
>> On Sunday 18 December 2005 14:32, Mohammad Shokuie wrote:
>>
>>> As a matter of fact im serious to know where is the source of echo  
>>> in a
>>> pure VoIP connection, i think the most of echo problems come from  
>>> hybrid
>>> circuits which are not an issue in pure VoIP sessions.
>>
>>
>> Easy.  Get better endpoints.  In a pure-voip loop you have echo due to
>> acoustic coupling from the earpiece to the mic, or the speaker to  
>> the mic in
>> a speakerphone.  Easy way to tell: in a call with bad echo, have  the 
>> other
>> side mute.  If your echo goes away, you've got your culprit.
>>
>> Also note that if your transmit level is too high or they have the  
>> volume up
>> too loud on their end it could push the audio coupling over what  the 
>> design
>> specifications were.
>
>
> We're having some issues with a Budgetone, especially in speaker  
> phone mode causing echo.  I think I read the specs have a feature  
> line item of "Echo cancellation (pending)", lol.
>
> No way to fix this other than buying new phone(s)?
>
>
> Phil
>
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