网络释义
1)indicator signal,指示信号2)index signal,指示信号3)alarm indication signal,报警指示信号4)sense signal;colour signal,彩色指示信号5)alarm indication signal,告警指示信号6)acoustical zero indication signal,零点指示信号7)idle indicating signal,空线指示信号8)alarm indication signal (AIS),告警指示信号9)trouble blinking,事故指示信号10)AU-AIS:Administrative Unit Alarm Indication SignalAU,告警指示信号