https://app.knowbase.one/vault/rfc/docid/6676
RFC6141: Re-INVITE and Target-Refresh Request Handling in the Session Initiation Protocol (SIP)
Internet Engineering Task Force (IETF) G. Camarillo, Ed. Request for Comments: 6141 C. Holmberg Updates: 3261 Ericsson Category: Standards Track Y. Gao IS...