作用:CC建立確認(rèn)過程監(jiān)視定時(shí)器
啟動(dòng):MSC發(fā)送RECALL消息
停止:MSC收到SETUP消息
超時(shí):定時(shí)器超時(shí)后,MSC用原因值 “recovery on timer expiry”向MS發(fā)送RELEASE COMPLETE消息,釋放MM連接,進(jìn)入“空”(“null”)狀態(tài)并通知所有在MSC側(cè)占用的實(shí)體,清除本次呼叫
取值:最小15s(When applied to the supplementary service CCBS, the timer T334 can either represent the recall timer T4 or the notification timer T10 (see GSM 03.93). Thus the timer T334 can take two different values. GSM 03.93 defines the range of these values.)