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In this video, we explore MF signaling! This is part 3 of an ongoing series called "Dial Equipment Appreciation"
0:00 - Intro & History
03:55 - Tones and what they mean
06:55 - MF phone call
07:40 - MF phone call NOW WITH TONES!
08:58 - MF receiver
09:55 - Digits and what they mean
11:30 - Blue Box