https://app.knowbase.one/vault/rfc/docid/4482
RFC4091: The Alternative Network Address Types (ANAT) Semantics for the Session Description Protocol (SDP) Grouping Framework
Network Working Group G. Camarillo Request for Comments: 4091 Ericsson Category: Standards Track J. Rosenberg Cisco Systems ...
https://app.knowbase.one/vault/rfc/docid/4483
RFC4092: Usage of the Session Description Protocol (SDP) Alternative Network Address Types (ANAT) Semantics in the Session Initiation Protocol (SIP)
Network Working Group G. Camarillo Request for Comments: 4092 Ericsson Category: Standards Track J. Rosenberg Cisco Systems ...