In SIP terminology, what does the BYE method signify?

In SIP (Session Initiation Protocol) terminology, the BYE method is specifically used to terminate an ongoing session. When a participant has finished with a communication session, such as a voice or video call, they will send a BYE request to the other participant to formally end the session. This request ensures that both parties acknowledge that the session is concluding and that resources associated with the call can be released.

The use of the BYE method is essential for managing the life cycle of a communication session efficiently, allowing both ends to close out the call cleanly, which is critical in maintaining clear and organized signaling within SIP communications. This method helps in avoiding any lingering states or potential ambiguity about the status of the session after it has ended.

In contrast, the other methods mentioned, such as starting a session, changing call parameters, or establishing connections, refer to different functionalities that are not associated with the termination of a session.