Communications system for transmitting and receiving data and vo

Details Communications system for transmitting and receiving data and vo Communications system for transmitting and receiving data and vo

1984-12-13

1987-06-02

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 29, 370111, 379 93, H04J 312

Patent

active

046708740

ABSTRACT:
A communications system for transmitting and receiving data and voice signals simultaneously on 2-wire signal lines, which superposes and extracts high frequency modulated data signals using a high frequency transformer which is coupled to the 2-wire signal line. The transformer has two windings which are short-circuited with respect to high frequency components, but which pass low frequency voice signals between the 2-wire signal line and a low frequency hybrid circuit.

REFERENCES:
patent: 3824347 (1974-07-01), Sorber et al.
patent: 3875339 (1975-04-01), Gruen et al.
patent: 4306116 (1981-12-01), McClure et al.
patent: 4476559 (1984-10-01), Brolin et al.

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