Communications system having optical transmission line switching system
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United States of America Patent
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-
Jul 18, 1995
Issued Date -
N/A
app pub date -
Nov 16, 1994
filing date -
Sep 18, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A communications system includes a plurality of optical transmission lines in an active system and an optical transmission line in a protection system, and transmitter/receiver devices connected to respective ends of the optical transmission lines. The transmitter/receiver devices respectively include a first interface unit for establishing a first interface with signal transmission lines, a second interface unit for establishing a second interface with one of the optical transmission lines, a first multiplexer/demultiplexer unit for executing a first multiplexing and demultiplexing operation, and a second multiplexer/demultiplexer unit for executing a second multiplexing and demultiplexing operation. Further, the transmitter/receiver devices respectively include a switching unit, which is provided between the first and second multiplexer/demultiplexer units, for selectively coupling the first multiplexer/demultiplexer units in the active system with the first multiplexer/demultiplexer units in the protection system by means of optical fiber cables.
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