https://app.knowbase.one/vault/rfc/docid/4952
RFC4538: Request Authorization through Dialog Identification in the Session Initiation Protocol (SIP)
Network Working Group J. Rosenberg Request for Comments: 4538 Cisco Systems Category: Standards Track June 2006 Request Authorization through Dialog Identification ...
https://app.knowbase.one/vault/rfc/docid/6226
RFC5707: Media Server Markup Language (MSML)
Independent Submission A. Saleem Request for Comments: 5707 Y. Xin Category: Informational RadiSys ISSN: 2070-1721 G. Sharratt ...