Optical communication system
First Claim
1. An optical communication system comprising:
- first and second optical terminal apparatuses;
first and second optical repeating installations;
a working transmission line coupling said first and second optical terminal apparatuses via said first optical repeating installation; and
a protection transmission line coupling said first and second optical terminal apparatuses via said second optical repeating installation,each of said first and second optical terminal apparatuses and said first and second optical repeating installations comprising;
means for transmitting an overhead signal including an identifier for identifying an apparatus or installation to be supervised with main signals, to said working transmission line and said protection transmission line by multiplexing the overhead signal with main signals when a respective one of said first and second optical terminal apparatuses and said first and second repeating installation operates as a transmitting apparatus or installation;
means for transferring the overhead signal as it is to one of said working transmission line and said protection transmission line via said means for transmitting an overhead signal when the apparatus or installation to be supervised is not identified by the identifier;
means for returning a response signal to the respective apparatus or installation operating as a transmitting apparatus or installation via one of said working transmission line and said protection transmission line, from which the overhead signal has been received, when the apparatus or installation to be supervised is identified by the identifier; and
means for cutting the respective apparatus or installation from one of said working transmission line and said protection transmission line so as not to transfer the overhead signal thereto, and passing through the overhead signal in other of said apparatuses and installations.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
12 Citations
15 Claims
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1. An optical communication system comprising:
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first and second optical terminal apparatuses; first and second optical repeating installations; a working transmission line coupling said first and second optical terminal apparatuses via said first optical repeating installation; and a protection transmission line coupling said first and second optical terminal apparatuses via said second optical repeating installation, each of said first and second optical terminal apparatuses and said first and second optical repeating installations comprising; means for transmitting an overhead signal including an identifier for identifying an apparatus or installation to be supervised with main signals, to said working transmission line and said protection transmission line by multiplexing the overhead signal with main signals when a respective one of said first and second optical terminal apparatuses and said first and second repeating installation operates as a transmitting apparatus or installation; means for transferring the overhead signal as it is to one of said working transmission line and said protection transmission line via said means for transmitting an overhead signal when the apparatus or installation to be supervised is not identified by the identifier; means for returning a response signal to the respective apparatus or installation operating as a transmitting apparatus or installation via one of said working transmission line and said protection transmission line, from which the overhead signal has been received, when the apparatus or installation to be supervised is identified by the identifier; and means for cutting the respective apparatus or installation from one of said working transmission line and said protection transmission line so as not to transfer the overhead signal thereto, and passing through the overhead signal in other of said apparatuses and installations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. 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:
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means for transmitting an overhead signal including an identifier for identifying an optical terminal apparatus or an optical repeating installation to be supervised with main signals, to the working transmission line and the protection transmission line by multiplexing the overhead signal with the main signals when the optical terminal apparatus is operating as a transmitting apparatus; means for transferring the overhead signal as it is to one of said working transmission line and said protection transmission line via said transmitting means when the apparatus or installation to be supervised is not identified by the identifier; means for returning a response signal to the optical terminal apparatus via one of the working transmission line and the protection transmission line, from which the overhead signal has been received, when the apparatus or installation to be supervised is identified by the identifier; and means for cutting the optical terminal apparatus from one of the working transmission line and the protection transmission line so as not to transfer the overhead signal thereto when set to a cut operation state, and for passing the overhead signal when set to a through operation state. - View Dependent Claims (11, 12)
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13. 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:
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means for transmitting an overhead signal including an identifier for identifying an optical terminal apparatus or an optical repeating installation to be supervised with main signals to the working transmission line and the protection transmission line by multiplexing the overhead signal with the main signals when the optical repeating installation operates as a transmitting apparatus; means for transferring the overhead signal as it is to one of said working transmission line and said protection transmission line via said transmitting means when the apparatus or installation to be supervised is not identified by the identifier; means for returning a response signal to the optical repeating installation via one of the working transmission line and the protection transmission line, from which the overhead signal is received, when the apparatus or installation to be supervised is identified by the identifier; and means for cutting the optical repeating installation from one of the working transmission line and the protection transmission line so as not to transfer the overhead signal thereto when set to a cut operation state, and for passing the overhead signal when set to a through operation state. - View Dependent Claims (14, 15)
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Specification