[asterisk-users] Echo on PRI

[garth at bitco.co.za]

Hi All

I have an Asterisk server with two PRI's into a Samsung DCS500 which in
turn has 4 PRI's into the Telco.  I have echo on some calls only over
500km away.  I have set:

echocancel=yes
echotraining=800
echocancelwhenbridged=yes
rxgain=1
txgain=-1

Volumes on the ZAP channels are set correctly.

Echo problems in the past have been straight forward to remove with the
correct echotraning and volumes set.  I am quite certain it is due to
calls going through the Samsung.  Any ideas?

Kind Regards
Garth