| 释义 |
call progress signal 呼叫进展信号 A call control signal transmitted from the data circuit-terminating equipment (DCE) to the calling data-terminal equipment (DTE) to indicate the progress of the establishment of a call, the reason why the connection could not be established, or any other network condition. 从数据电路端接设备(DCE)向呼叫的数据终端设备(DTE)发送的一个呼叫控制信号,用来 表示呼叫建立的进展情况,不能建立联系的原因,或其它各种网络状态。 |