Digital radio relay system

Details Digital radio relay system Digital radio relay system

1984-11-15

1986-08-19

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

370 75, 179170R, H04B 336

Patent

active

046073760

ABSTRACT:
A radio relay system for a fully-digitalized transmission network is disclosed. In the system, a received auxiliary signal can be by-passed from receiver to transmitter via a switching circuit provided in the auxiliary unit when an additional auxiliary signal is not input to the equipment. When a local auxiliary signal, for example, order wire signal from telephone equipment, is input, the switching circuit operatively disconnects the switching circuit and switches to supply the additional auxiliary signal to the transmitter. The auxiliary unit is thus by-passed upon the occurrence of a failure of the built-in circuit or power supply of the auxiliary unit.

REFERENCES:
patent: 3201691 (1965-08-01), Lyon
patent: 3668525 (1972-06-01), McGraw
patent: 4107608 (1978-08-01), Saburi
patent: 4197496 (1980-04-01), Hiyama

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