[Asterisk-Users] Echo Canceling

[Tad Heckaman]

I have been battling echo since we installed a new system at one of
our clients. I am using a single span digium card. I believe this is
the first time someone has setup a PRI in this area (its way out in
the middle of nowhere). We get slight echo on all calls, and when
calling some numbers (long distance calls but still in the local
area), we get very loud echo. The person calling out can hear their
own voice at the same volume about a half second after they speak. Its
been getting annoying and I have tweaked everything I can, and even
tried diferent echo cans in zaptel.  I have talked to the telco
(Bellsouth) which does both local and long distance, and they couldn't
help me. They can fix the long distance echo, but they seem to fix it
only on a per number basis (I call with one number, and they fix it,
but then I call with another number, and they fix that, but it never
actually fixes ALL the echo for long distance). I am looking into
hardware echo cancelers, but I haven't found a place to get one.

Would switching to Sangoma cards help fix my issues? I know Digium
cards have issues on some servers/motherboards, and yet I haven't
heard of any issues with Sangoma cards. If someone has had issues then
I would like to hear them.

I know I can find some hardware echo can's on ebay and wire it up, but
I would like to have a better product that comes as a single span T1.

Thanks,
Tad