Something

[channels]
rxwink=300
usecallerid=yes
hidecallerid=no
restrictcid=no
callwaiting=no
usecallingpres=yes
echocancel=yes
echocancelwhenbridged=yes
immediate=no
signalling = pri_cpe
context=ingress
switchtype = national
pridialplan = national
rxgain = 2.0
txgain = 2.0
group=1
channel => 1-23
channel => 25-47
group=2
channel => 49-71
channel => 73-95