| 摘要 |
PROBLEM TO BE SOLVED: To share standby optical transmission means to suppress equipment in an optical transmission system having wavelength multiplex transmission devices which perform transmission through mutually different transmission lines.SOLUTION: The optical transmission system includes: a first optical multiplexer unit which wavelength multiplexes a plurality of optical signals, to output to a first transmission line; first optical signal transmission means which converts a client signal into an optical signal of a transmission wavelength, to output to the first optical multiplexer unit; a second optical multiplexer unit which wavelength multiplexes a plurality of optical signals, to output to a second transmission line which is different from the first transmission line; second optical signal transmission means which converts a client signal into an optical signal of a transmission wavelength, to output to the second optical multiplexer unit; standby optical transmission means which inputs the client signal, input to the first optical signal transmission means or the second optical signal transmission means, to convert into an optical signal of a transmission wavelength; and optical path switchover means which outputs an optical signal, output from the standby optical transmission means, to the first and second optical multiplexer units.SELECTED DRAWING: Figure 1 |
