Digital radio relay equipment

Details Digital radio relay equipment Digital radio relay equipment

H - Electricity

04

J

363/28

H04J 3/12 (2006.01) H04B 1/74 (2006.01) H04B 17/00 (2006.01)

Patent

CA 1219978

ABSTRACT A radio relay system for a fully-digitalized transmission network is disclosed. In the system, a received auxiliary signal from a preceding station can be by-passed from the receiver to the transmitter via a switching circuit provided in the auxiliary unit as long as no additional auxiliary signal is input to the equipment at the present station. When a local auxiliary signal, for example, an order wire signal from the telephone equipment, is input, at the present station the switching circuit operatively disconnects the by-pass and switches in the additional auxiliary signal. When a failure in the auxiliary unit or power supply occurs preventing an additional auxiliary signal from being input, the by-pass is switched on, thereby ensuring that auxiliary signals derived from the preceding station are passed to subsequent stations.

467874

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