全部

1·Key Pulsing is a method of signaling by depressing keys on a line otherwise arranged for rotary pulse dialing.

按键脉冲是通过在一条线上按键而不是旋转脉冲拨号的信令方法。

2·The Pulse property contains the command string used to instruct the modem to use pulse mode for dialing. Pulse dialing is necessary for phone lines that are unable to handle tone dialing. Example: P.

Pulse 属性包含用于指示调制解调器用于拨号使用的脉冲模式的命令字符串。在电话线不能做按钮拨号时必须使用脉冲拨号。例如： P。