Patent ID: 6643042
Filing Date: 2003-11-04
Classification: H04J,H04Q

Abstract:
An optical communication network node comprising:first optical dropping means for dropping optical signals having arbitrary wavelengths of wavelength-multiplex optical signals which is multiplied by a wavelength; switching means for conducting switching of a signal after a drop by means of said optical dropping means, and an external input signal that is externally input; and first optical inserting means for joining a signal after switching by means of said switching means to said wavelength-multiplexing optical signals, wherein said switching means includes: second optical dropping means for further dropping optical signals having arbitrary wavelengths of the signal after drop by means of said first optical dropping means; a first input terminal to which a signal after drop by means of said second optical dropping means is input; a plurality of first output terminals; a first ATM switch for outputting an input to said first input terminal to a desired one of said plurality of first output terminals; a second input terminal to which said external input signal is input; a plurality of second output terminals; a second ATM switch for outputting an input to said second input terminal to a desired one of said plurality of output terminals; and second optical inserting means for joining an output of said second ATM switch to the signal after drop by means of said first optical dropping means.