Multi-frequency signaling

（重定向自Multifrequency pulsing）

In telephony, multi-frequency signaling (MF) is a signaling system that was introduced by the Bell System after World War II. It uses a combination of tones for address (phone number) and supervision signaling. The signaling is sent in-band over the same channel as the bearer channel used for voice traffic.

单词	Multifrequency pulsing
释义	Multifrequency pulsing 英语百科 Multi-frequency signaling （重定向自Multifrequency pulsing） In telephony, multi-frequency signaling (MF) is a signaling system that was introduced by the Bell System after World War II. It uses a combination of tones for address (phone number) and supervision signaling. The signaling is sent in-band over the same channel as the bearer channel used for voice traffic.
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