[asterisk-dev] Adding Octastic Soft-Echo to external SIP adapters

[Eric "ManxPower" Wieling]

It looks like your PSTN connections is coming directly into the Cisco. 
If this is the case then the Cisco would be the device that has to do 
the echo canceling.

Vazir wrote:
> PSTN (MY CALLING CARD CUSTOMERS) <---> CISCO AS5350 <---> 
> VOIP SIDE (SATELLITE ~600mc roundtrip - 300 mc oneway!)
> 
> So the echo is generated by the VOIP side. I can hear it 
> very well is I switch off echo cancellation on the CISCO
> 
> but surprisingly CISCO takes 64 ms echo cancel parameter and 
> cancels echo on a such a latent link...
> 
> On 7 May 2007 16:27, Eric "ManxPower" Wieling wrote:
>> I don't have enough information about your setup to
>> answer that.
>>
>> I assume you have
>>
>> VoIP phone <-> Network <-> Cisco <-> H323 <-> Some
>> PSTN/VoIP Box
>>
>> Is this correct?
>>
>> Vazir wrote:
>>> How than my CISCO AS5350 gets H323 VOIP and
>>> echo-cancels so exelently :))))))
>>>
>>> On 7 May 2007 12:45, Eric "ManxPower" Wieling wrote:
>>>> Generally, once the audio is converted to VoIP audio
>>>> latency is far too high for echo canceling to work. 
>>>> Echo needs to be canceled BEFORE the call is converted
>>>> to VoIP.