Asterisk; Call Screening - Press 1 to accept, Press 2 to reject

I wanted a telephone number a certain person could call and I would have the option to accept or reject their call. If I rejected the call they would hear a recording like I had traveled outside of my cellular service area (like that happens anymore!). I googled how to do this and found all sorts of outdated rubbish....

As usual, I figured it out on my own. Today, in 2011. My findings are below.

Global variables -CAN- be set in a macro and read back in the original context.

We'll pretend my number, and extention is 8005551212

;8005551212 Test # For Call Screening ;First, we answer. exten => 8005551212,1,Answer ;Next we pass them along to our SIP Trunk. Tell it to ring for 20 secons, r=ring for calling party, g=return here when called party hangs up, M=macro exten => 8005551212,2,Dial(SIP/18779009000@sipprovider|20|rgM(testscreen)) ;Now that they're back, check our variable "ACTION" to see what happened. exten => 8005551212,3,GotoIf($["${ACTION}" == "0"] ?10) ;Nobody (or voicemail) answerd, not in service. exten => 8005551212,4,GotoIf($["${ACTION}" == "1"] ?11) ;Call was answered, all is well. Hang up. exten => 8005551212,5,GotoIf($["${ACTION}" == "2"] ?10) ;You were rejected, no in service. ;Anything else, and hang up. exten => 8005551212,6,Hangup exten => 8005551212,10,MP3Player(/home/asterisk/not_in_service.mp3) exten => 8005551212,11,Hangup [macro-testscreen] exten => s,1,SetGlobalVar(ACTION=0) ;Default, nobody answered or no key was pressed (voicemail presses no keys). exten => s,2,Playback(followme/no-recording.wav) ;Says: You have an incomming call exten => s,3,Read(ACCEPT|followme/options|1) ;Says: Press 1 to accept, 2 to reject exten => s,4,Gotoif($[${ACCEPT} = 1] ?50) ; Connect exten => s,5,Gotoif($[${ACCEPT} = 2] ?30) ; Reject exten => s,30,Set(MACRO_RESULT=CONTINUE) exten => s,31,SetGlobalVar(ACTION=2) ; Rejected exten => s,32,Goto(51) exten => s,50,SetGlobalVar(ACTION=1) ; Connected and conversed. exten => s,51,NoOp exten => h,1,NoOp

You should have most of the sound files.
You'll have to get the not in service one from Napster (http://bit.ly/ki1pse) -- I did.
You'll want to change the SIP/18779009000@sipprovider to the number you're calling (i.e.: 8779009000) @ your sip provider.

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