language=pt_br usecallerid=yes callwaiting=no usecallingpres=yes callwaitingcallerid=yes ;rxgain=1 ;txgain=-7 ;rxgain=4 ;txgain=4 ;echocancel=128 ;echocancelwhenbridged=yes ;echotraining=yes ;busydetect=yes ;busycount=4 relaxdtmf=yes