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Jani.Hautakorpi@ericsson

Extending the SIP Reason Header with Warning Codes draft-hautakorpi-reason-header-for-warnings-00.txt. Jani.Hautakorpi@ericsson.com. The Main Idea. New protocol value for SIP Reason header field: Warning codes from RFC3261.

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Jani.Hautakorpi@ericsson

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  1. Extending the SIP Reason Header with Warning Codesdraft-hautakorpi-reason-header-for-warnings-00.txt Jani.Hautakorpi@ericsson.com

  2. The Main Idea • New protocol value for SIP Reason header field: • Warning codes from RFC3261. • Motivation: Ability to convey richer information about why a SIP request was generated. • Example: Reason: SIP-Warning; cause=304; text="Media type not available"

  3. Example Scenario A Controller B INVITE 200 OK ACK INVITE 480 Temp. Unavailable Warning: 399 pc2.example.org “Low battery” ACK BYE Reason: SIP; cause=480; text="Request Terminated" Reason: SIP-Warning; cause=399; text="Low battery" 200 OK

  4. Way Forward • One big open issue: RFC3261 only allows Warning codes that are related to the SDP. Should this be the case also in the future? • Comments?

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