Duplex digital span transmission circuit arrangement

Details Duplex digital span transmission circuit arrangement Duplex digital span transmission circuit arrangement

1983-06-22

1985-04-30

Atkinson, Charles E.

Excavating

34082501, 370 16, G06F 1120, H04B 346

Patent

active

045148449

ABSTRACT:
In a telecommunications switching system, a thick film digital span circuit arrangement is connected between a digital span and a switching network of the switching system. The transmission circuit arrangement converts unipolar switching network data to bipolar data for use by the digital span. The telecommunications switching system provides for duplicated data transmission to the digital span. Duplicated transmission circuits are arranged in an active/standby configuration under CPU control without affecting the overall impedance seen by the digital span.

REFERENCES:
patent: 4365247 (1982-12-01), Bargeton et al.
patent: 4365248 (1982-12-01), Bargeton et al.
patent: 4393493 (1983-07-01), Edwards
patent: 4395772 (1983-07-01), Trested, Jr.
patent: 4413335 (1983-11-01), Clements et al.
patent: 4442518 (1984-04-01), Morimoto
patent: 4455645 (1984-06-01), Mijioka et al.

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