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US 5,493,432 AGranted
Optical communication system
AssigneeFujitsu Limited
InventorKazuhiro Yoneda
Life of this patent
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AssigneeFujitsu Limited
InventorKazuhiro Yoneda
Estimating the term…
An optical communication system includes first and second optical terminal apparatuses, first and second optical repeating installations, a working transmission line coupling the first and second optical terminal apparatuses via the first optical repeating installation, and a protection transmission line coupling the first and second optical terminal apparatuses via the second optical repeating installation. Each of the first and second optical terminal apparatuses and the first and second optical repeating installations include a mechanism for transmitting an overhead signal including an identifier to the working transmission line and the protection transmission line by multiplexing the overhead signal with main signals when operating as a transmitting apparatus or installation, where the identifier identifies an apparatus or installation to be supervised, a mechanism for transferring the overhead signal as it is when not identified by the identifier, a mechanism for returning a response signal to one of the working transmission line and the protection transmission line from which the overhead signal is received when identified by the identifier, and a mechanism for cutting the apparatus or installation from one of the working transmission line and the protection transmission line so as not to transfer the overhead signal thereto, and passing through the overhead signal in other apparatuses and/or installations.
An optical communication system comprising:
An optical terminal apparatus adapted for making a communication with another optical terminal apparatus via a working transmission line and a protection transmission line, respectively having optical repeating installations inserted therein, said optical terminal apparatus comprising:
An optical repeating installation adapted for an optical communication system which makes a communication between two optical terminal apparatuses via a working transmission line and a protection transmission line each having the optical repeating installation inserted therein, said optical repeating installation comprising:
Dependencies are inferred from the claim text.