RFC 3892: The Session Initiation Protocol (SIP) Referred-By Mechanism

The Session Initiation Protocol (SIP) REFER method provides a mechanism where one party (the referrer) gives a second party (the referee) an arbitrary URI to…

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Incoming relationships (3 related RFCs)

Updated by — RFC 8217: Clarifications for When to Use the name-addr Production in SIP Messages
Normatively referenced by — RFC 9248: Interoperability Profile for Relay User Equipment
Informatively referenced by — RFC 5379: Guidelines for Using the Privacy Mechanism for SIP