It seems ETSI is also working on this issue. They are working on a document (on draftting stage) that seems to cover these aspects.
Deliverable Type: EN Ref. DEN/SPAN-130299 Technical Body: SPAN 13 "Services and Protocols for Advanced Networks (SPAN); Interworking of DSS1 and SIP for ISDN basic call and supplementary services" _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
