exten => _*[1-3]X,1,ChanIsAvail(Sip/${EXTEN:1},sj)
exten => _*[1-3]X,n,NoOp(Avail Status:  ${AVAILSTATUS})
exten => _*[1-3]X,n,SIPAddHeader(Call-Info: sip:192.168.16.50\;answer-after=0)
exten => _*[1-3]X,n,Dial(${AVAILORIGCHAN},15)
exten => _*[1-3]X,n+101,Playback(pbx-invalid)
exten => _*[1-3]X,n,Hangup()


----CLI OUTPUT----
 -- Executing [*15@internal-admin:1] ChanIsAvail("SIP/33-08330e40", "Sip/15|sj") in new stack
    -- Executing [*15@internal-admin:2] NoOp("SIP/33-08330e40", "Avail Status:  0") in new stack
    -- Executing [*15@internal-admin:3] SIPAddHeader("SIP/33-08330e40", "Call-Info: sip:192.168.16.50;answer-after=0") in new stack
    -- Executing [*15@internal-admin:4] Dial("SIP/33-08330e40", "Sip/15|15") in new stack
    -- Called 15