Section: 5.4.4.2.4 Receipt of a RELEASE message from the mobile station
Content: 5.4.4.2.4.1 Release, CCBS not requested For a network that does not support the "CCBS activation" option: The call control entity of the network in any state except the "null" state and the "release request" state, shall, upon receipt of a RELEASE message: stop all running call control timers; send a RELEASE COMPLETE message; release the MM connection; and return to the "null" state. For a network that does support the "CCBS activation" option: The call control entity of the network in any state except the "null" state and the "release request" state, shall, upon receipt of a RELEASE message without a Facility IE including an Invoke=CCBSRequest: stop all running call control timers; send a RELEASE COMPLETE message; release the MM connection; and return to the "null" state. 5.4.4.2.4.2 Release, CCBS Requested For a network that does not support the "CCBS activation" option: The call control entity of the network in any state except the "null" state and the "release request" state, shall, upon receipt of a RELEASE message: stop all running call control timers; send a RELEASE COMPLETE message; release the MM connection; and return to the "null" state. For a network that does support the "CCBS activation" option: The call control entity of the network in any state except the "null" state and the "release request" state, shall, upon receipt of a RELEASE message containing a Facility IE including an Invoke=CCBSRequest: stop all running call control timers; then attempt to activate the recall; then send a RELEASE COMPLETE message indicating the success or failure of the recall activation attempt; release the MM connection; and return to the "null" state.