Transparent multiplexer/demultiplexer

Details Transparent multiplexer/demultiplexer Transparent multiplexer/demultiplexer

1997-04-24

1998-11-24

Ton, Dang

Multiplex communications

Diagnostic testing

Fault detection

370319, 370337, 370535, H04J 116

Patent

active

058417605

ABSTRACT:
A configuration for a SONET transport node comprises a pair of transparent mux/demuxs provided at two sites and connected over a high rate span. The T-Muxs provide continuity of all tribs and maintain a lower bit rate linear or ring system through the higher bit rate span. The lower bit rate linear or ring system operates as if it were directly connected without the higher bit rate midsection. For the forward direction of the traffic, the T-Mux comprises a multi-channel receiver for receiving the trib signals and providing for each trib signal a trib SPE and a trib OH. The trib SPEs are multiplexed into a supercarrier SPE and the trib OHs signals are processed to generate a supercarrier OH. A supercarrier transmitter maps the supercarrier SPE and the supercarrier OH into a supercarrier signal and transmits same over the high rate span. Reverse operations are effected for the reverse direction of traffic. With this invention, an entire ring system does not have to be upgraded to a higher line rate due to fiber exhaust on a single span. The invention is particularly applicable to OC-48/OC-12/OC-3 linear and ring networks and the high rate span could be an OC-192 line.

REFERENCES:
patent: 5355362 (1994-10-01), Gorshe et al.
patent: 5436890 (1995-07-01), Read et al.
patent: 5452307 (1995-09-01), Koyama et al.
patent: 5675580 (1997-10-01), Lyon et al.

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