[Asterisk-Users] Echo & TDM11B

[David K Parker]

I've been spending countless hours in an effort to remove echo from an
Asterisk at Home 2.0 install with a TDM11B. I've been in contact with Digium
and followed their troubleshooting steps.  I've tried every echo
canceller,adjusting RX & TX gain with ztmonitor calling the local CO,
running fxotune, every conceivable combination of echocancel values and
echotraining. Echo doesn't seem to vary much, even going from one extreme
value to the other. I did notice a strange problem along the way. When I
dialout, whether using an analog phone, softphone, or Sipura, and the
outside party disconnects, I don't hang up, it takes Asterisk more than half
a minute to figure out that the  call was disconnected. This does not happen
when I dial a long distance number using my  Teliax trunk. It is definately
only an issue with the Digium FXO line. Does anyone have a clue what could
cause this problem.

Thanks,
David
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