https://app.knowbase.one/vault/rfc/docid/8074
RFC7433: A Mechanism for Transporting User-to-User Call Control Information in SIP
Internet Engineering Task Force (IETF) A. Johnston Request for Comments: 7433 Avaya Category: Standards Track J. Rafferty ISSN: 2070-1721 Human Communications ...
https://app.knowbase.one/vault/rfc/docid/8075
RFC7434: Interworking ISDN Call Control User Information with SIP
Internet Engineering Task Force (IETF) K. Drage, Ed. Request for Comments: 7434 Alcatel-Lucent Category: Standards Track A. Johnston ISSN: 2070-1721 Avaya ...