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。

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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。

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