[channels] context=from-internal usecallerid=yes hidecallerid=no callwaitingcallerid=yes threewaycalling=yes transfer=yes cancallforward=yes callreturn=yes echocancel=yes echocancelwhenbridged=yes echotraining=yes rxgain=0.0 txgain=0.0 group=1 callgroup=1 pickupgroup=1 immediate=no musiconhold=default relaxdtmf=yes protocolclass=mfcr2 protocolvariant=br,10,10 protocolend=cpe group = 1 channel => 1-15 channel => 17-31