SIP Call Control - Transfer

1
SIP Call Control - Transfer

• Robert Sparks
• Alan Johnston
• Dan Petrie

2
Recent Changes

• Added Dan as co-author an incorporated many ideas
  from draft-petrie-sipping-xfer-issues-01.txt
• Changed to REFERs sent out of dialog if recipient
  provides a GRUU.
• Only works if GRUU grid parameter is a dialog
  identifier
• Plan to change text back to in-dialog REFER
• Changed to Refer-To set to GRUU if present, AOR
  if not, and Contact if AOR fails.
• Included transfer as an Ad-hoc conference call
  flow.
• Included semi -attended transfer discussion.
• Included one recommended flow and two not
  recommended flows.
• Added section on gateway transfer issues.

3
Plan

• Change back to in-dialog REFER due to problems
  with grid-as-dialog-id idea
• Ready for WGLC after next revision

4
Contacts

• Alan Johnston
• alan.johnston_at_mci.com

• Robert Sparks
• rjs_at_xten.com

Dan Petrie dpetrie_at_pingtel.com