Optical network backup channel switching control device

An optical network backup channel switching control device for use with an optical network of the type having a local optical data processing unit, a remote optical data processing unit, and an optical transmission line, where the optical transmission line is interconnected between the local optical data processing unit and the remote optical data processing unit and includes a main channel and a backup channel;

• the optical network backup channel switching control device comprising:
• a local switching control unit for interconnecting the local optical data processing unit with the optical transmission line;
• and
• a remote switching control unit for interconnecting the remote optical data processing unit with the optical transmission line;
• and wherein
• the local switching control unit and the remote switching control unit each includes:
• a monitoring beam generating module, which is capable of generating a main-channel monitoring beam and a backup-channel monitoring beam;
• a main-channel multiplexing module, which is capable of injecting the main-channel monitoring beam generated by the monitoring beam generating module in a multiplexing manner into the main channel of the optical transmission line for transmitting the main-channel monitoring beam to opposite side;
• a backup-channel multiplexing module, which is capable of injecting the backup-channel monitoring beam generated by the monitoring beam generating module in a multiplexing manner into the backup channel of the optical transmission line for transmitting the backup-channel monitoring beam to the opposite side;
• a main-channel monitoring module, which is capable of monitoring whether the main channel of the optical transmission line can successfully transmit the main-channel monitoring beam from the opposite side;
• and if NOT, capable of generating a first switching enable signal;
• a backup-channel monitoring module, which is capable of monitoring whether the backup channel of the optical transmission line can successfully transmit the backup-channel monitoring beam from the opposite side;
• and if NOT, capable of generating a second switching enable signal;
• and
• a switching module, which is initially set to be connected to the main channel of the optical transmission line;
• and during actual operation, capable of responding to the first switching enable signal from the main-channel monitoring module and the second switching enable signal from the backup-channel monitoring module by switching the connection to the backup channel of the optical transmission line.