[incoming]
exten => s,1,Dial(SIP/6678&SIP/6670&SIP/6651,20,tr)  ; corresponding clients must be configured in sip.conf
exten => s,2,Playback(vm-goodbye)
exten => s,3,Hangup

[outgoing]
exten => _9X.,1,NoOp("Call for "${EXTEN:1})
exten => _9X.,2,Dial(Zap/1/${EXTEN:1})
exten => _9X.,3,Dial(Zap/2/${EXTEN:1})  ; comment this line out if you have less than 2 X100Ps
exten => _9X.,4,Dial(Zap/3/${EXTEN:1})  ; comment this line out if you have less then 3 X100Ps

[x-lite]  ; Note: SIP extensions are defined here as "66" followed by any two digits
exten => _66XX,1,NoOp("Call for "${EXTEN})
exten => _66XX,2,Dial(SIP/${EXTEN},60,tr)
exten => _66XX,3,Congestion
include => outgoing