Restoration network architecture

Details Restoration network architecture Restoration network architecture

1997-01-23

1999-02-09

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

370384, 370216, H04B 338, G01R 3108, H04L 1250

Patent

active

058700323

ABSTRACT:
A network (100) capable of quickly restoring traffic includes main and tertiary communications media (103, 105), each having associated main channels (102.sub.1-- 102.sub.n) and tertiary channels (104.sub.1 -104.sub.m), respectively. A first main channel (102.sub.1) and first tertiary channel (104.sub.1) run in parallel between a pair of digital signal protection switches (106.sub.1 -106.sub.2) coupled to a pair of digital cross-connect systems (108.sub.1, 116) that are spanned by the remaining main channels (102.sub.2 -102.sub.n) and tertiary channels (104.sub.2 -104.sub.m) in parallel. A controller 120 is responsive to the traffic on the main communications medium for signaling the first and second digital protection switches (106.sub.1, 106.sub.2) to switch traffic from the first main channel (102.sub.1) to the first tertiary channel (104.sub.1) should the first main channel become unavailable. The controller also subsequently signals the first and second digital cross-connect devices, which switch slower than the digital signal protection switches, to switch traffic from one or more of the other main channels to corresponding tertiary channels should such main channels become unavailable.

REFERENCES:
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patent: 5444583 (1995-08-01), Arslan et al.
patent: 5463615 (1995-10-01), Steinhorn
patent: 5495471 (1996-02-01), Chow et al.
patent: 5621722 (1997-04-01), Edmaier et al.
patent: 5625478 (1997-04-01), Doerr et al.
patent: 5646936 (1997-07-01), Shah et al.

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