[Asterisk-Users] echo cancel from telco

[Imran Ahmed]

On 2/7/06, Imran Ahmed <codentest at gmail.com> wrote:
> > here is a little explanation:
> >
> > End user (You) ---------> Your Telco ----------> Carrier 1 ----------->
> > Carrier 2 ------------ Carrier 3 -----------> Carrier 4(PTT)
> > --------------- > Far End User
> >
> > So basically, the Echo cancelling work backwards usually cancellation
> > for you would be done by Carrier 4, 3, 2, 1, or your Telco in that order
> > and echo for the Far End User would be done by Your Telco, Carrier 1, 2,
> > 3, or 4 in that order.
> >
> > Why in that order?
> >
>
> AFAIK, the order is exactly the opposite, and if the user is
> experiencing echo on the sip phone, its most likely that the other end
> is the source of echo, which should be cancelled by the telco because
> its is nearer to the source of echo than the sip phone gateway.
>
Never mind! I took the wording in a wrong way.