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Multi-Frequency Signaling System: Revision history

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27 March 2025

  • curprev 21:3321:33, 27 March 2025 Sarah talk contribs 189 bytes +189 Created page with "The '''multi-frequency signaling system (MF''') is a method of transmitting telephone numbers from one point to another by using combinations of tones to represent each digit in the number." Tag: Visual edit
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