Patent ID: 6778725
Filing Date: 2004-08-17
Classification: H04B,H04J,H04Q

Abstract:
An optical switching apparatus having plural input ports and plural output ports and a first optical switch and a second optical switch for carrying out route setting between said input ports and said output ports, said optical switching apparatus comprising:plural branching portions which are provided with said plural input ports respectively, receive input signals and output the input signals to said first and second optical switches; said first and second optical switches for carrying out the route setting of the input signals from said branching portions; plural selecting portions which are provided with said plural output ports respectively, selects one of the input signals set a route by said first and second optical switches and outputs; plural optical performance monitoring portions which are provided in front and rear of said first and second optical switches, monitor optical signals; and a controller for concealing an alarm detected by any one of said optical performance monitoring portions when at least one of (1) change of a set route by at least one of said first and second optical switches and (2) a system switch operation of switching a redundant system comprising said first and second optical switches by switching of said branching portions and said selecting portions is carried out.