SIP Call Flows Changes and Plan

1
SIP Call Flows Changes and Plan

• draft-ietf-sip-call-flows-05.txt
• Alan Johnston, WorldCom
• Steve Donovan, Robert Sparks, Chris Cunningham,
  Dean Willis, Jonathan Rosenberg, dynamicsoft
• Kevin Summers, TTI
• Henning Schulzrinne, Columbia University

2
Changes

• Last version had minor changes/nits
• Currently in (extended) Last Call Review
• No open issues

3
Plan

• Bis Updates
• From tags!
• Proxy tag/branch handling
• other minor
• Then, ready for WGLC - Jan 2002
• Contact
• alan.johnston_at_wcom.com

4
SIP Service Examples Changes and Plan
draft-ietf-sip-service-examples-03.txt Alan
Johnston, WorldCom Robert Sparks, Chris
Cunningham, Steve Donovan Kevin Summers, TTI
5
Changes

• Minor changes to REFER syntax
• Referred-By syntax
• Changes to call hold signaling
• Other bis updates

6
Plan

• Use SIP Event package
• draft-rosenberg-sip-call-package-00.txt
• More use of Caller Prefs
• draft-ietf-sip-callerprefs-05.txt
• Single Line Extension
• Resolve Open Issues
• WGLC by June 2002?

7
Open Issues

• Call Park
• Hold or REFER?
• Directed Pickup
• Ringing phone pickup - REGISTER or other?
• REFER
• security authorization for transfers
• Contact
• alan.johnston_at_wcom.com