[asterisk-users] Using Calls Rejection Reasons

[Philipp von Klitzing]

Hi!

> To complicate it a bit, is there a way to extract the rejection reason (in
> this case 486) without using the DIALSTATUS and to use it? It can be
> useful for rejections that are not handled by DIALSTATUS.

If the other side is also an Asterisk system: When call is hang up that 
involves a SIP channel, Asterisk sends the extra SIP headers "X-Asterisk-
HangupCause" and "X-Asterisk-HangupCauseCode" in in the BYE message. 
You can read this using the SIP_HEADER() function in the h extension.

Asterisk 1.8 will allow to read SIP response codes in the dialplan via 
{HASH(SIP_CAUSE,<channel-name>)}.
Asterisk 1.8 also comes with a 'use_q850_reason' configuration option for 
generating and parsing, if available, "Reason: Q.850;cause=<cause code>". 

See:
http://www.voip-
info.org/wiki/index.php?page=Asterisk+variable+hangupcause

Apart from the two approaches outlined above the answer is to your 
question is "no": You would need a real SIP proxy to do that.

Philipp