signalledadj.信号的；预示的；告知的动词signal的过去式和过去分词.signaln.信号；标志v.(发信号)通知、表示adj.显著的signaling traffic信令业务Signal procession信号处理signaling routing信令选路signal insulation信号隔离signal input part信号输入端signal error rate信号误码率signaling circuit信令电路signal truncation信号截短signal identifier信号识别器signal separation信号分离