Wavelength selection switch system and method for controlling wavelength selection switch

A method for controlling a wavelength selection switch system comprising:

• a wavelength selection switch including an input port and an output port;
• a nonvolatile memory in which configuration information for controlling an operation of the wavelength selection switch is stored;
• a high-speed memory in which reading and writing can be performed at a higher speed than in the nonvolatile memory, and that stores a copy of the configuration information stored in the nonvolatile memory;
• and
• a control unit that controls an operation of the wavelength selection switch based on the configuration information read from the high-speed memory,
• wherein the method includes a step in which the control unit periodically reads the configuration information stored in the nonvolatile memory and writes a copy of the read configuration information to the high-speed memory.