[trunkgroups]

[channels]
signalling=fxs_ks
busydetect=off
callprogress=off
echocancel=yes
context=incoming
group=1
channel => 3,1
group=2
channel => 2

    -- Starting simple switch on 'Zap/1-1'
Apr 14 12:50:11 NOTICE[14350]: chan_zap.c:6223 ss_thread:  Got event 18 (Ring Be
gin)...
    -- Executing NoOp("Zap/1-1", "") in new stack
    -- Executing Dial("Zap/1-1", "SIP/fred|12|t") in new stack
    -- Called fred
    -- SIP/fred-006a7f30 is ringing
  == Spawn extension (incoming, s, 2) exited non-zero on 'Zap/1-1'
    -- Hungup 'Zap/1-1'