[sip-incoming-calls]
exten => s,1,Dial(SIP/10&SIP/11&SIP/12&SIP/20&SIP/21,20,tr)

[sip-incoming-calls]
exten => s,1,Set(thedid=${CALLERID(dnid)})

[sip-incoming-calls]
exten => s,1,Set(thedid=${SIP_HEADER(To)})
exten => s,2,Set(thedid=${CUT(thedid,@,1)})
exten => s,3,Set(thedid=${CUT(thedid,:,2)})

exten => s,4,GotoIf($["${thedid}" = "0120120020"]?6:5)
exten => s,5,GotoIf($["${thedid}" = "0230230030"]?7)
exten => s,6,Dial(SIP/10&SIP/11&SIP/12,20,tr)
exten => s,7,Dial(SIP/20&SIP/21,20,tr)

[sip-incoming-calls]
exten => _0120120020,1,Dial(SIP/10&SIP/11&SIP/12,tr)
exten => _0120120020,n,hangup
exten => _0230230030,1,Dial(SIP/20&SIP/21,20,tr)
exten => _0230230030,n,hangup