https://app.knowbase.one/vault/rfc/docid/1133
RFC3033: The Assignment of the Information Field and Protocol Identifier in the Q.2941 Generic Identifier and Q.2957 User-to-user Signaling for the Internet Protocol
Network Working Group M. Suzuki Request for Comments: 3033 NTT Category: Standards Track January 2001 The Assignment of the Information Field and Protocol Identifier in...
https://app.knowbase.one/vault/rfc/docid/5989
RFC5502: The SIP P-Served-User Private-Header (P-Header) for the 3GPP IP Multimedia (IM) Core Network (CN) Subsystem
Network Working Group J. van Elburg Request for Comments: 5502 Ericsson Telecommunicatie B.V. Category: Informational April 2009 The SIP P-Served-User Private-Header (P-Header) for the...