紧急呼叫 [通信] emergency call ; e-call ; eCall ; [通信] urgent call

远程电话应急呼叫 SRST ; Survivable Remote Site Telephony

紧急呼叫系统 emergency call box system ; TELEAID ; Emergency call system ; Urgently calling system

紧急呼叫设备 EMCEQ EMergency Call EQuipment ; EMCEQ

紧急呼叫业务 Emergency Calls

紧急呼叫服务 Enhanced Emergency Services

紧急呼叫的标识符 INDICATOR FOR EMERENGY CALL

紧急呼叫格式 urgency call format

紧急呼叫键 emergency call key

紧急呼叫信道操作 EMERGENCY CHANNEL OPERATION