Hello all, A couple of days ago, I just asked the way to solve the echo problems in capi channels. After read a lot of web pages and news group, I just started to midify the file, /etc/asterisk/capi.conf. All my capi channnels was configured in the same way. msn=XXXXXXXXXX incomingmsn=* controller=1 softdtmf=1 accountcodecontext=outgoing ;echosquelch=1 echocancel=yes ;echotail=64 ;callgroup=1 ;deflect=12345678 devices=4 As you can see, only the "echocancel" parameter is uncoment. This was not enough, because we continiuos earing our own echo in the capi calls. Among to uncoment the "echocancel", parameter, I needed to change the Txgain and Rxgain values in the capi.conf file, to avoid the echo and get a good sound quality. The values that worked for me are: rxgain=0.4 txgain=0.6 Regards from Spain Ismael.