[Asterisk-Dev] Bug report 4783 and RFC 3326: The Reason Header Field for SIP

[Olle E. Johansson]

John Todd wrote:
> 
> 
> While there are certainly arguable points here, I'd suggest that this is
> relevant to the comparison:
> 
> http://www.zvon.org/tmRFC/RFC3398/Output/index.html
> 
> This defines a standard for ISUP-to-SIP mapping, which could possibly be
> used for PRI-to-SIP mapping, as many (all?) of the ISDN q.931 messages
> are in there.  The issue is that q.931 codes are insufficient to
> describe some subset of SIP (or any IP protocol) failure messages.
> 
...a standard which I recently added to chan_sip in CVS head :-)

I need to go through this a bit more so that chan_sip actually sets
cause codes in a proper way itself.

/O