Digital radio transmission system

Details Digital radio transmission system Digital radio transmission system

1992-02-18

1993-11-16

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 55, 370 856, 340827, H04J 116

Patent

active

052630170

ABSTRACT:
A digital radio transmission system having a first terminal office (10), a second terminal office (20) and at least one drop/insertion (DI) office (30) located therebetween. Long distance lines between the first and second terminal offices are handled in the DI office together with first and short distance lines each being replaced by first and second protection lines, respectively. A protection line for the long distance lines is realized by commonly using the first and second protection lines inherently allotted to the first and second short distance lines. Further the line switching, due to a fault in the long distance line, from the faulty long distance line to the both the first and second short line side protection lines can be achieved by communicating a particular line switching control signal among all the offices.

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patent: 4434484 (1984-02-01), Huffman et al.
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patent: 4811021 (1989-03-01), Yoshimota et al.
patent: 4881220 (1989-11-01), Yomogida et al.
patent: 4984233 (1991-01-01), Nakayashiki et al.

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