[asterisk-users] Getting SIP Response Code from HANGUPCAUSE

[Philipp Kempgen]

Eric "ManxPower" Wieling wrote:

>> On 10/25/07, Douglas Garstang <dougmig33 at yahoo.com> wrote:
>>> I'd like to grab the SIP response code that comes back from an INVITE. The
>>> HANGUPCAUSE gives the converted ISDN cause code. Anyone know of a way to get
>>> the SIP response code instead?
> 
> There is an RFC for this.  I don't know if Asterisk follows the RFC or not.
> 
> http://www.faqs.org/rfcs/rfc3398.html

The conversion is "lossy". More than 1 SIP cause code is mapped
to a Q.931 cause code (in Asterisk at least). See
hangup_sip2cause() in chan_sip.c

Regards,
  Philipp Kempgen

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