Data transmission system

Details Data transmission system Data transmission system

H - Electricity

04

M

325/17, 379/5

H04M 11/06 (2006.01)

Patent

CA 1230162

DATA TRANSMISSION SYSTEM Abstract of the Disclosure Voice and data signals can be transmitted simultaneously yet independently over a subscriber telephone line. The speech and data use the same cable pair as far as the local exchange but thereafter they may be routed to the same destination or to different destinations, as desired. Each terminal unit (A or B) has a low pass filter (2) to isolate the voice and data. A data switch (5) switches an oscillator (6) by FSK. Switch (7) locks onto the Data Ready Interface (8). Bandpass filter (9) feeds the signal to the telephone line. A loop back switch LBS provides for testing from the exchange.

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