SIP BYE

The SIP method used to terminate an active session (end a call), sent by either party in the dialog and triggering media stream teardown. BYE can only be sent within an established dialog — it cannot be sent before the INVITE three-way handshake completes. The other party responds with 200 OK and immediately terminates RTP streams. If a proxy is involved, BYE must traverse the same route as the original INVITE using the recorded Route set.