asterisk users - Jul 2006 - SIP To: header

Is there a way to access the actual SIP To: header?  I know the URI is easily
accessible, and is handy for a multitude of things, but in a scenario in which
a call has been forwarded from one URI to another, it's handy to know whence
the forward was initiated (which would only be in the To: header presumably).
Ideally, I need this via AGI, but if it can be accessed anywhere at all, I can
code something up.

N.

Isnt SIP_HEADER(TO) enough?

e.g.

exten => 1111,1,Answer
exten => 1111,2,Set(TO_HEADER=${SIP_HEADER(TO)})
exten => 1111,3,NoOp(TO_HEADER)
exten => 1111,4,Hangup

http://www.voip-info.org/wiki/index.php?page=Asterisk+func+sip_header

> -----Original Message-----
> From: asterisk-users-bounces@lists.digium.com
> [mailto:asterisk-users-bounces@lists.digium.com]On Behalf Of sip
> Sent: 13 July 2006 12:12
> To: asterisk-users@lists.digium.com
> Subject: [asterisk-users] SIP To: header
> 
> 
> Is there a way to access the actual SIP To: header?  I know 
> the URI is easily
> accessible, and is handy for a multitude of things, but in a 
> scenario in which
> a call has been forwarded from one URI to another, it's handy 
> to know whence
> the forward was initiated (which would only be in the To: 
> header presumably).
> Ideally, I need this via AGI, but if it can be accessed 
> anywhere at all, I can
> code something up.
> 
> N.
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You can pull anything from the header with SIP_HEADER

I'll often just pass them into a Perl AGI as $ARGV[0] $ARGV[1] with this
line:


exten => myapp,2,AGI(myapp.agi|${SIP_HEADER(From)}|${SIP_HEADER(To)})


Note also you can get *anything* in the SIP header  SIP_HEADER(Mumblefratz)
etc.
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Hi List,

When a call comes in on a specific number (via ISDN) we would like the 
callee ( SIP Phone ) to get an audio message before the caller is put 
through.  Is this possible?

To clarify:

Caller calls a specific number
Callee answers the phone as normal
Callee hears a message
Caller is seamlessly put through to callee

It would also help if the caller continues to hear ringing until the 
caller is put through to the callee.

Hope this makes sense.

Thanks in advance

Phil.
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