asterisk users - Mar 2006 - automatic callback when busy

I'm trying to set up the following application:

When a SIP extensions calls another one which is busy, the caller would be 
able to ask for an automatic callback: when the callee becomes available 
again, asterisk would ring both the caller's and the callee's phones and
connect them when both parties answer.

Has anybody done this before? (I tried to search the archs but couldn't find
this yet.) Any suggestions for the best solution?

Thanks a lot in advance!

Regards,
-Tam?s

I'm postponing this activity indefinitely but I collected some ideas.
Try something similar to this recipe:

First of all store dialed extension number as
	 
	exten => _[2-8]XX,102,SetVar(${UNIQUEID}=${EXTEN})
	exten => _[2-8]XX,103,Goto(busyphone,s,1)

then you can use 3 options as	press 3 for voice mail 6 for loop until free
and 9 for registering for automatic call back:

	[busyphone]

	;busy message voicemail and queue
	exten => s,1,Answer()
	exten => s,2,Wait(2)
	exten => s,3,DigitTimeout(2)
	exten => s,4,ResponseTimeout(2)
	exten => s,5,Background(/etc/asterisk/voice/pabx/mtl-busy)
	exten => 3,1,VoiceMail(b${${UNIQUEID}})
	exten => 6,1,Dial(SIP/${${UNIQUEID}},20,trS(1080))
	exten => 6,2,Playback(/etc/asterisk/voice/pabx/mtl-unavailable)
	exten => 6,3,Goto(outside,s,1)
	exten => 6,102,Wait(5)
	exten => 6,103,Goto(6,1)
	exten => 9,1,DBPut(CallBack/${${UNIQUEID}}=${CALLERIDNUM})
	exten => 9,2,Hangup
	exten => i,1,Goto(outside,s,1)
	exten => t,1,Goto(outside,s,1)
	exten => T,1,Goto(outside,s,1)

Don't blam eme if there is some error.
--
Mimmus

> -----Original Message-----
> From: asterisk-users-bounces@lists.digium.com 
> [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of 
> Tam?s Bond?r
> Sent: Monday, March 27, 2006 2:46 PM
> To: asterisk-users@lists.digium.com
> Subject: [Asterisk-Users] automatic callback when busy
> 
> I'm trying to set up the following application:
> 
> When a SIP extensions calls another one which is busy, the 
> caller would be able to ask for an automatic callback: when 
> the callee becomes available again, asterisk would ring both 
> the caller's and the callee's phones and connect them when 
> both parties answer.
> 
> Has anybody done this before? (I tried to search the archs 
> but couldn't find this yet.) Any suggestions for the best solution?
> 
> Thanks a lot in advance!
> 
> Regards,
> -Tam?s
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