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。
Key Pulsing is a method of signaling by depressing keys on a line otherwise arranged for rotary pulse dialing.
一种用按键代替拨号盘的电话机，可作为最简单的数据通信设备。
A telephone unit which is with touch-keys to substitute the dialing board. It can be used as a simplest data communication device.
用按键或按钮代替旋转式拨号盘，产生一个数字序列以建立电路连接的方法。
The use of keys or push-buttons instead of a rotary dial to generate a sequence of digits to establish a circuit connection.
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