作用:CC建立确认过程监视定时器
启动:MSC发送RECALL消息
停止:MSC收到SETUP消息
超时:定时器超时后,MSC用原因值 “recovery on timer expiry”向MS发送RELEASE COMPLETE消息,释放MM连接,进入“空”(“null”)状态并通知所有在MSC侧占用的实体,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.)