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[channels]
context=from-pstn
usecallerid=yes
hidecallerid=no
threewaycalling=yes
transfer=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=yes
rxgain=0.0
txgain=0.0
relaxdtmf=yes
callgroup=0
pickupgroup=0
immediate=no
callerid=asreceived
musiconhold=default
protocolclass=mfcr2
protocolvariant=br,20,4
protocolend=cpe
group=1
channel => 1-15
channel => 17-31