Process for transmission of analog and/or digital information, e

Details Process for transmission of analog and/or digital information, e Process for transmission of analog and/or digital information, e

1988-01-25

1990-08-07

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 32, H04L 506

Patent

active

049474839

ABSTRACT:
In transmission of information over junction routes with exchanges, the feedback circuits that occur in hybrid sets are a major problem. High demands are made of them and the balancing networks. This invention eliminates these shortcomings in that quasi-4-wire circuits are formed by providing coded alternating currents of different frequencies and/or frequency positions for the two transmission directions and filters with high stop band attenuation for the opposite direction are provided when it is necessary to separate the two transmission directions.

REFERENCES:
patent: 3555193 (1971-01-01), Brand et al.
patent: 3769463 (1973-10-01), Graham et al.
patent: 4101833 (1978-07-01), Bingham et al.
patent: 4236244 (1980-11-01), Strehl
patent: 4302629 (1981-11-01), Foulkes et al.
patent: 4335455 (1982-06-01), Hirschmann
patent: 4402076 (1983-08-01), Krajewski
patent: 4597073 (1986-06-01), Staples
patent: 4731798 (1988-03-01), Dirr
patent: 4799213 (1989-01-01), Fitzgerald

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