I’ve got AAH running with a TDM400P on normal British telecom phone lines. Whenever someone calls in the person picking up the phone has a very loud echo, which fades away for a while, then returns a few minutes later. Oddly though if you make an outbound call, no echo at all. I’ve experimented with FXOTune, and the TX/RX gains, echo cancellation etc. No joy.
apologies for not replying sooner, I was despatched to the wilds of Aberdeen!
The zapata.conf is below, I did try various combinations of echocancel, and echotraining, also from voip-wiki and by using the gain meter I tried some rxgain, txgain values.
As an aside I don’t think faxdetect=no, has any effect!
Cheers
Gordon
[channels]
language=en
context=from-pstn
signalling=fxs_ks
rxwink=300 ; Atlas seems to use long (250ms) winks
;
; Whether or not to do distinctive ring detection on FXO lines
;
;usedistinctiveringdetection=yes