http://www.foaas.com/ Certainly a BOF. < grin> Or at least invite these fine folks from New Zealand to submit a draft. Date to be determined. April 1??? !!! I certainly see multiple applications certainly in SIP as a SIP 4xx Client failure response. :_))))) to augment our STIR work??? — Richard Shockey Shockey Consulting LLC Chairman of the Board SIP Forum www.shockey.us www.sipforum.org richard<at>shockey.us Skype-Linkedin-Facebook rshockey101 PSTN +1 703-593-2683