Communication method and apparatus

Details Communication method and apparatus Communication method and apparatus

1985-06-05

1988-01-12

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

3701104, 340310R, H04J 900, H04J 312, H04M 1104

Patent

active

047196165

ABSTRACT:
A method of communicating data between first and second communication apparatus having the steps of transmitting line current from the first communication apparatus to a transmission line interconnecting the first and second communication apparatus, the line current being controlled at an analog value representing analog data and having superimposed thereon a digital signal representing digital data, receiving at the second communication apparatus the analog and digital data transmitted by the first communication apparatus, controlling the transmission line voltage at an analog value for transmitting analog data from the second communication apparatus to the first communication apparatus and superimposing on the voltage containing the analog data a digital signal representing digital data, and receiving at the first communication apparatus the analog and digital data transmitted by the second communication apparatus.

REFERENCES:
patent: 3718766 (1973-02-01), Stover
patent: 4097692 (1978-06-01), Felix
patent: 4328579 (1982-05-01), Hashimoto et al.
patent: 4477896 (1984-10-01), Aker

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