https://app.knowbase.one/vault/rfc/docid/3296
RFC2976: The SIP INFO Method
Network Working Group S. Donovan Request for Comments: 2976 dynamicsoft Category: Standards Track October 2000 The SIP INFO Method Status of this Memo This ...
https://app.knowbase.one/vault/rfc/docid/3879
RFC3515: The Session Initiation Protocol (SIP) Refer Method
Network Working Group R. Sparks Request for Comments: 3515 dynamicsoft Category: Standards Track April 2003 The Session Initiation Protocol (SIP) Refer Method Status of ...