[asterisk-users] Echo...

[Eric "ManxPower" Wieling]

Leo Ann Boon wrote:
> 
>> 3. It seems to be only incoming calls that have an echo and only on the
>> inside, the outside never hears one, what does this mean?
>>   
> Why don't you record the call at asterisk? Leave the zaptel settings as 
> default, i.e. standard echo cancel and rxgain=txgain=0. Don't use 
> MixMonitor, just leave everything as in and out. It will help you 
> isolate whether it's PSTN echo. If you don't hear any echo in the 
> recording, then the problem is most likely your phone.

*sigh*  Any time a call hits an analog 2-wire circuit there will be 
echo.  In normal PSTN only situations the echo is so FAST that you do 
not hear it.  It is only where there is a high latency path in the 
circuit like a VOIP phone where you will hear the echo.

Recording the call on Asterisk will not let you hear the echo because 
there is no high latency portion of the circuit.