FIELD: multichannel optical communications, possible use for transmitting and receiving signals.
SUBSTANCE: in device monochromator system is augmented with transmitting module and receiving module, which contain M protected channels for communication of transmitting side and receiving side, N working channels, switching device, which in accordance to switching request from monochromator system switches the signal from aforementioned working channel to aforementioned protecting channel, or switches signal on aforementioned protective channel back to aforementioned working channel, while M and N are natural numbers and M<N.
EFFECT: realization of independent protection mechanism for monochromator and decreased consumption of optical wave length resource.
2 cl, 6 dwg
