Comments
The user agent client uses BYE to indicate to the server that it wishes to release the call. A BYE request is forwarded like an INVITE request and MAY be issued by either caller or callee. A party to a call SHOULD issue a BYE request before releasing a call ("hanging up"). A party receiving a BYE request MUST cease transmitting media streams specifically directed at the party issuing the BYE request. If the INVITE request contained a Contact header, the callee SHOULD send a BYE request to that address rather than the From address. This method MUST be supported by proxy servers and SHOULD be supported by redirect and user agent SIP servers.
Posted by yogendra
BYE is basically sip request message and Indicates to the server that the client wants to release the call.
Posted by sagitraz