Add-drop multiplexer

Details Add-drop multiplexer Add-drop multiplexer

1995-05-08

1996-12-17

Marcelo, Melvin

Multiplex communications

Pathfinding or routing

Through a circuit switch

359117, 370388, H04J 308, H04J 1408

Patent

active

055861156

ABSTRACT:
An add-drop multiplexer having a plurality of OC--N and OC--M (M <N) interfaces and a drop and insertion unit. The drop and insertion unit includes a plurality of switch units corresponding to the second stage switch and a plurality of first and third stage time slot interchange circuits provided on the side of a plurality of low speed side interfaces. A multiplexing signal can be linked between low speed side transmission lines by using simple circuits.

REFERENCES:
patent: 5185736 (1993-02-01), Tyrrell et al.
patent: 5283785 (1994-02-01), Ferguson
American National Standard for Telecommunications, Digital Hierarchy--Optical Interface Rates and Formats Specifications (SONET), Draft-- Sep., 1990.

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