https://app.kbone.net/vault/rfc/docid/6467
RFC5947: Requirements for Multiple Address of Record (AOR) Reachability Information in the Session Initiation Protocol (SIP)
Internet Engineering Task Force (IETF) J. Elwell Request for Comments: 5947 Siemens Enterprise Communications Category: Informational H. Kaplan ISSN: 2070-1721 Acme Packet ...