[sip]

exten => 1001,1,ringing
exten => 1001,2,wait(2)
exten => 1001,3,Answer
exten => 1001,4,Echo

exten => 1002,1,SetCallerID(${CALLERID})
exten => 1002,2,Macro(exten,SIP/andy,${EXTEN},${CALLERIDNUM})  ; call the macro passing params - generic macro for all extens.

exten => 1003,1,SetCallerID(${CALLERID})
exten => 1003,2,Macro(exten,IAX2/1003,${EXTEN},${CALLERIDNUM}) ; call the macro passing params - generic macro for all extens.



; this checks to see if anyone called then calls them first
; when they pick up me back - you might want to check that it's
; a valid internal exten - otherwise the call to a zap chan would
; be at your cost.

exten => h,1,Set(CB=0)                                     ; Set default value for CB (CB =1 callback active)
exten => h,2,DBGet(CB=CALLBACK/${CALLERIDNUM})             ; Get CB
exten => h,3,DBGet(CB2=CALLBACK2/${CALLERIDNUM})           ; Get Who called
exten => h,4,NOOP(${CB})                                   ; Display CB (not really required)
exten => h,5,GotoIf($["${CB}" = "1"]?6:99)                 ; Check if CB=1 if it does to the callback stuff at 6 else jump to 99
exten => h,6,NOOP ;Wait(2)
exten => h,7,DBPut(CALLBACK/${CALLERIDNUM}=0)              ; set CB to 0 cos we don;t want a loop.
exten => h,8,System(echo "Channel: Local/${CB2}@sip" >/var/spool/asterisk/outgoing/${UNIQUEID}.callback) ; fill the
exten => h,9,System(echo "Context: sip" >>/var/spool/asterisk/outgoing/${UNIQUEID}.callback)             ; call file
exten => h,10,System(echo "Extension: ${CALLERIDNUM}" >>/var/spool/asterisk/outgoing/${UNIQUEID}.callback) ;with data
exten => h,11,System(echo "CallerID: ${CB2}" >>/var/spool/asterisk/outgoing/${UNIQUEID}.callback)


exten => h,99,NoOp

[macro-exten]

exten => s,1,Dial(${ARG1})
exten => s,2,Goto(s,102)

; you might want to play with timeouts, and perhaps use waitexten...

exten => s,102,Set(CB=0)                                     ; Set default value for CB (CB =1 callback active)
exten => s,103,DBGet(CB=CALLBACK/${CALLERIDNUM})             ; Get CB
exten => s,104,GotoIf($["${CB}" = "1"]?99:105)                 ; Check if CB=1 if it does tell them they can't else jump to 99
exten => s,105,ResponseTimeout(3)
exten => s,106,Set(SCB=${ARG2},SCB2=${ARG3}) ;we need to set these because you might exit the macro and we need the values.
exten => s,107,Background(vm-tocallback,,,callback-activate) ; play sound jump to callback-activate if key pressed

exten => s,99,Playback(you-cant-do-this-there-is-a-callback-already)
exten => s,100,Hangup

; Catch dross
exten => i,1,goto(h,1)
exten => t,1,goto(h,1)
exten => h,1,NoOP

[callback-activate]

exten => 1,1,DBPut(CALLBACK/${SCB}=1)           ; put 1 into this exten callback to indicate active
exten => 1,2,DBPut(CALLBACK2/${SCB}=${SCB2})    ; put who is was that called
exten => 1,3,Playback(conf-muted)               ; play some sound to tell the user callback is active
exten => 1,4,Hangup 


; this checks to see if anyone called then calls them first
; when they pick up me back - you might want to check that it's
; a valid internal exten - otherwise the call to a zap chan would
; be at your cost.
; we repeat it here just in case we were calling someone too...

exten => h,1,Set(CB=0)                                     ; Set default value for CB (CB =1 callback active)
exten => h,2,DBGet(CB=CALLBACK/${CALLERIDNUM})             ; Get CB
exten => h,3,DBGet(CB2=CALLBACK2/${CALLERIDNUM})           ; Get Who called
exten => h,4,NOOP(${CB})                                   ; Display CB (not really required)
exten => h,5,GotoIf($["${CB}" = "1"]?6:99)                 ; Check if CB=1 if it does to the callback stuff at 6 else jump to 99
exten => h,6,NOOP ;Wait(2)
exten => h,7,DBPut(CALLBACK/${CALLERIDNUM}=0)              ; set CB to 0 cos we don;t want a loop.
exten => h,8,System(echo "Channel: Local/${CB2}@sip" >/var/spool/asterisk/outgoing/${UNIQUEID}.callback) ; fill the
exten => h,9,System(echo "Context: sip" >>/var/spool/asterisk/outgoing/${UNIQUEID}.callback)             ; call file
exten => h,10,System(echo "Extension: ${CALLERIDNUM}" >>/var/spool/asterisk/outgoing/${UNIQUEID}.callback) ;with data
exten => h,11,System(echo "CallerID: ${CB2}" >>/var/spool/asterisk/outgoing/${UNIQUEID}.callback)

exten => h,99,NoOp