在二进制位同步通信中，使用时钟脉冲来控制数据和控制字符的同步。

In binary synchronous communication, the use of clock pulses to control synchronization of data and control characters.

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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。

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.

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