七号信令讲义，DOC格式。

信令：控制交换机动作的信号。

信号：信号是一种统称，而信令是指具有动作含义的操作控制命令。

信令方式：信令的传送所要遵守的一定的规约和规定。它包括信令的结构形式，信令在多段路由上的传送方式及控制方式。

信令系统：指完成特定的信令方式时所使用的通信设备的全体。-No.7 signaling handouts, DOC format. Signaling: control of the switch operation signal. Signal: the signal is a generic term which refers to a move signaling the meaning of the operation control command. Signaling method: the transmission of signaling must be observed and provisions of the statute. It includes the structure of the form of signaling, signaling in a multi-segment routing the transmission and control. Signaling system: refers to the completion of a specific signaling mode of communications equipment used by all.