Line access apparatus for in-band communication

Details Line access apparatus for in-band communication Line access apparatus for in-band communication

1985-11-19

1988-06-07

Masinick, Michael A.

Multiplex communications

Wide area network

Packet switching

375 36, 379327, H04J 114

Patent

active

047501707

ABSTRACT:
A line access apparatus for in-band communication includes a line coupler that functions as a high voltage isolation device and has a resonant frequency out of the signal transmission band. A carrier signal of about the resonant frequency is modulated at an in-band frequency to convey information across the line coupler.

REFERENCES:
patent: 2009438 (1935-07-01), Dunnley
patent: 3562792 (1968-06-01), Berlincourt et al.
patent: 3860769 (1975-01-01), Pachynski, Jr.
patent: 4058678 (1977-11-01), Dunn et al.
patent: 4529904 (1985-07-01), Hattersley
patent: 4573168 (1986-02-01), Henze et al.
patent: 4583215 (1986-04-01), Hargrave et al.
patent: 4639933 (1987-01-01), Howell et al.

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