Dahdi strong echo cancellation

Hello everyone…
I have a curiosity… it happens to me in a new installation with two analogue channels that a strong echo is heard on one of the two.
I used fxotune but no luck. I wanted to know if the various options in system.conf of dahdi such as echotraining are applied to the individual channel or to the global settings of the card.
Do you recommend mg2 or oslec? Or is HPEC worth it?


echocanceller is configured in /etc/dahdi/system.conf

echotraining (and much more) is configured in /etc/asterisk/chan_dahdi.conf

Either one should be configurable on a per-channel or group basis. Note that if you activate hardware echo cancellation then it will probably override many of your other settings.

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