[Asterisk-Users] Echo Problem with T411P

[Mike Fedyk]

Steve Davies wrote:
> On 6/15/06, Idris AVCI <idris.avci at vodatech.com.tr> wrote:
>>
>> Hello,
>>
>> There are 3 PRI's connected to the card each from different operators.
>> Especially echo occured on span 3 is really annoying. Configuration 
>> files
>> are as follows. Is there something wrong in conf ?
>>
>
> Have you verified that the provider on span 3 is not using some high
> latency routing? The configuration line "context=Satelco" suggests a
> satellite company? They should do the echo cancelling on your behalf
> if they have high latency routes as the asterisk EC will never keep up
> under those circumstances.
>
> We have even experienced problems within Europe where providers route
> national calls via international routes to save money. This adds
> significant latency and makes any echo so heavily delayed that
> asterisk cannot remove it.
More than 128ms?