Requirements for multiple address of record (AOR) reachability information in the Session Initiation Protocol (SIP)

Document Type Replaced Internet-Draft (individual)
Author John Elwell 
Last updated 2010-04-08 (latest revision 2010-02-08)
Replaced by RFC 5947
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document states requirements for a standardized SIP registration mechanism for multiple addresses of record, the mechanism being suitable for deployment by SIP service providers on a large scale in support of small to medium sized PBXs. The requirements are for a solution that can, as a minimum, support AORs based on E.164 numbers. This work is being discussed on the mailing list.


John Elwell (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)