| 摘要 |
PROBLEM TO BE SOLVED: To obtain highly reliable communication system and communication device having redundancy, while suppressing increase in the wavelength resource in a wavelength multiplex section, even when performing communication while mixedly accommodating the signals, which cannot be accommodated by the same signal accommodation device.SOLUTION: A communication system includes: a plurality of active system signal accommodation units 3 for accommodating input signals and outputting an optical signal; a plurality of reserve system signal accommodation units 6 for using when a failure occurs in the active system signal accommodation unit; a transmission side switching unit 7 for selectively outputting the optical signals from the plurality of active system signal accommodation units 3; and a wavelength multiplexing unit for multiplexing the optical signals outputted from the active system signal accommodation units 3 and transmission side switching unit. Upon occurrence of a failure in the active system signal accommodation unit 3, the transmission side switching unit 7 outputs the optical signal from a reserve system signal accommodation unit 6 corresponding to the active system signal accommodation unit 3.SELECTED DRAWING: Figure 1 |
