Greetings,
I am running Asterisk 1.4.25 with Dahdi Complete 2.2.0, on a Digium TE121B PCI express card with a
VPMADT032 echo cancellation module, connected to an AT&T 24 channel PRI.

When I run dahdi show channel X on an active channel, I see this:
Echo Cancellation: 128 taps unless TDM bridged, currently ON
So I know the echo cancellation is working, however when I call a local analog land line, I get discernible echo.

Here is my chan_dahdi.conf:

[channels]
; configuration for T1 card as PRI
language = en

group = 1
echocancel = yes
echotraining = yes
signalling = pri_cpe
switchtype = 4ess
usecallerid = yes
context = incoming
channel => 1-23

Someone has to have had some experience with these hardware echo cancellers, any ideas? Should I adjust my rx and tx gains? Any advice would be very helpful. Thank you.
--

Jason Baker
IT Coordinator

Glastender, Inc.
5400 North Michigan Road
Saginaw, Michigan 48604 USA
Phone: 989.752.4275 ext. 228
Fax: 989.752.4276

www.glastender.com
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