Patent ID: 6081359
Filing Date: 2000-06-27
Classification: H04B,H04J,H04Q

Abstract:
A transmitting apparatus for wavelength-division-multiplex signal transmission, comprising:a plurality of optical signal transmitters for transmitting respective optical signals;wavelength converting means associated respectively with said optical signal transmitters, for converting wavelengths of optical signals transmitted from said optical signal transmitters into respective wavelengths and transmitting wavelength-converted optical signals;auxiliary wavelength converting means for converting a wavelength of an optical signal transmitted from said optical signal transmitters into a wavelength different from said wavelength-converted optical signals, and transmitting an auxiliary wavelength-converted optical signal;wavelength-division-multiplexing means for wavelength-division-multiplexing said wavelength-converted optical signals or said wavelength-converted optical signals and said auxiliary wavelength-converted optical signal, and transmitting wavelength-division-multiplexed signals;wavelength supervising means for monitoring said wavelength converting means and transmitting a detected failure signal when a failure of said wavelength converting means is detected;transmission switching means responsive to said detected failure signal, for switching from one of said wavelength converting means which suffers failure to said auxiliary wavelength converting means; andsupervising control signal transmitting means for transmitting a supervising control signal representative of information to identify said wavelength converting means which suffers failure and information indicating switching to said auxiliary wavelength converting means.