; ; Zapata telephony interface ; ; Configuration file [trunkgroups] [channels] language=en context=from-pstn usecallerid=yes hidecallerid=no callwaiting=yes usecallingpres=yes callwaitingcallerid=yes threewaycalling=yes transfer=yes cancallforward=yes callreturn=yes echocancel=yes echocancelwhenbridged=no echotraining=800 rxgain=0.0 txgain=0.0 group=0 callgroup=1 pickupgroup=1 immediate=no faxdetect=incoming group=1 signalling=fxs_ks ; pri_cpe = PRI slave ; pri_net = PRI master echocancel=yes ; You can set this to 32, 64, or 128, tweak to your needs. echocancelwhenbridged=yes echotraining=400 ; Asterisk trains to the beginning of the call, number is in milliseconds callerid=asreceived channel => 1-5 ; Set this to 1-15,17-31 for E1