[channels]
signalling=pri_cpe
language=en
context=pri-in
musiconhold=default
callerid=asreceived
;echocancel=yes
;echocancelwhenbridged=yes
;echotraining=yes
rxgain=1.0
txgain=1.0
callgroup=1
pickupgroup=1
busydetect=yes
busycount=8
callprogress=yes
usecallerid=yes
usecallingpres=yes
transfer=yes
threewaycalling=yes
immediate=no
callwaiting=yes
callwaitingcallerid=yes
faxdetect=both
cancallforward=yes
;switchtype=national
switchtype=5ess

group=1
channel => 1-23

=============================================================
[pri-in]
exten => _7273425135,1,Answer
exten => _7273425135,2,Wait(2)
exten => _7273425135,3,MeetMe();

exten => _3425135,1,Answer
exten => _3425135,2,Wait(2)
exten => _3425135,3,MeetMe();

exten => _5135,1,Answer
exten => _5135,2,Wait(2)
exten => _5135,3,MeetMe();

exten => i,1,Playback(pm-invalid-option)
exten => t,1,NoOp(Timed out)
exten => h,1,Hangup