Subject: [Sip] Question on Supplementary Services

From: P Sudarshanakrishnan-A14377 <[email-masked]>
Date: Tue, 19 Nov 2002 14:06:44 +0530

All
    Can somebody point me to drafts, Informational RFCs or BCPs that talk about 
implementing Supplementary services like Call Forwarding Unconditional (CFU),
Call Forwarding No Reply(CFNR), Call Forwarding Busy (CFB), Call Deflection (CD) at the User Agents.
 
I see a old obsoleted draft that talks about a "Diversion" header for these Supp Services. 
Is there any plan to revive this?
 
One straight forward approach is to send 3xx responses. This has a drawback that we cannot consult 
with the diverted-to party before actually diverting the call. 
 
Is there any working draft on this subject?
 
Thanks
 
regds
krish