超時:處于“釋放請求”狀態(tài)的網(wǎng)絡(luò)側(cè)CC實體在T308第一次超時時,將重發(fā)RELEASE消息,重新啟動T308,繼續(xù)保持在“釋放請求”狀態(tài)。在T308第二次超時時,網(wǎng)絡(luò)側(cè)CC實體將釋放MM連接,并返回“空”狀態(tài)(The call control entity of the network in the "release request" state, shall, at first expiry of timer T308, retransmit the RELEASE message, start timer T308, and stay in the "release request" state. At second expiry of timer T308, the call control entity of the network shall: release the MM connection; and return to the "null" state)