Carrier telephony is a method for carrying several simultaneous long-distance telephone conversations over the same transmission line. Each conversation is shifted to a different frequency band, allowing the channels to share the line by frequency-division multiplexing (FDM).
Carrier telephony is a method for carrying several simultaneous long-distance telephone conversations over the same transmission line. Each conversation is shifted to a different frequency band, allowing the channels to share the line by frequency-division multiplexing (FDM).
Source: Wikipedia "Carrier telephony" · CC BY-SA 4.0
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