Should be possible to set reason for a <hangup/> command

[benlangfeld]

SIP Reason header should be settable, probably indirectly via named reasons in the Rayo spec.

[benlangfeld]

We have a few options here:

1. Borrow SIP cause codes
2. Borrow ISDN (Q.850) cause codes
3. Borrow from Jingle (http://xmpp.org/extensions/xep-0166.html#def-reason).
4. Make up our own enumerations and map them to SIP codes in implementations (informally document best-practice mappings) very much like we do for <reject/> etc. If we do this, what should the allowed values be?

[bklang]

I'm personally inclined to stick close to SIP. FreeSWITCH has a mapping of ISDN to SIP hangup causes: http://wiki.freeswitch.org/wiki/Hangup_causes

[benlangfeld]

If we stick close to SIP, should we migrate other cases where we do a loose mapping to also borrow from SIP (end events, etc)?

[benlangfeld]

Missing use case

[emcgee]

The granularity of the SIP cause codes seems preferable at this point, although I personally think the XMPP codes being more generic would allow for greater future extensibility.