[Asterisk-Users] SIP-B?

[TC]

> I was just reading the release notes for the latest SPA-841 firmware, 
> and noticed that Sipura added support for "SIP-B" to this release.  
> This apparently adds support for bridged line appearances, parking 
> softkeys, called party ID, external missed call summary support, and a 
> handful of other useful features.  The release notes are available at 
> http://sipura.com/Documents/rnote/rn841-3.1.1a.htm
> 
> Does anyone have a clue where to find specs on SIP-B?  Google isn't 
> being very helpful.
http://www.watersprings.org/pub/id/draft-sharath-sipb-requirements-00.txt
but its been deleted from
http://www.ietf.org/internet-drafts/draft-sharath-sipb-requirements-01.txt
it was never an rfc :(
so did the big boys go it alone :) ?