Fiber optic synchronous digital hierarchy telecommunication...

Details Fiber optic synchronous digital hierarchy telecommunication... Fiber optic synchronous digital hierarchy telecommunication...

2005-09-27

2005-09-27

Ton, Dang T (Department: 2666)

Multiplex communications

Fault recovery

Bypass an inoperative station

Reexamination Certificate

active

06950392

ABSTRACT:
A fiber optic synchronous digital hierarchy telecommunication network provided with a protection system shared on the network is described, which comprises spans of pairs of optical fibers (N×2F) having network elements (N×2F-SDHNE) interposed therebetween, wherein the spares of pairs of optical fibers have a variable number N (N=1, 2, 3, . . . ) of pairs, and the network elements (N×2F-SDHNE) feature variable interconnection capability between said spans, so that several spans having number N of pairs of optical fiber even different can be connected to at least some of said network elements.

REFERENCES:
patent: 5179548 (1993-01-01), Snnderasa
patent: 5442623 (1995-08-01), Vu
patent: 6421318 (2002-07-01), Coltro
ITU-T G.803: Series G: Transmission Systems and Media, Digital Systems and Networks, Architecture of Transport networks Based on the Synchronous Digital Hierarchy (SDH), Jun. 1997.
ITU-T G.841: General Aspects of Digital Transmission Systems, “Types and Characteristics of SDH Network Protection Architectures” Apr. 1995.
ITU-T G.707: General Aspects of Digital Transmission Systems, “Network Node Interface for the Synchronous Digital Hierarchy (SDH)” Nov. 1995.
ITU-T G.872, Types and General Characteristics of Synchronous Digital Hierarchy (SDH) Equipment Sep. 1993.
ITU-G.783, “Characteristics of Synchronous Digital Hierarchy (SDH) Equipment Functional Blocks”, Sep. 1993.

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