Patent ID: 7302177
Filing Date: 2007-11-27
Classification: H04J

Abstract:
1. An optical transmission system including a plurality of optical transmission devices, comprising: a main device; and a plurality of expansion devices, the plurality of optical transmission devices are configured by the main device and the plurality of expansion devices, wherein the main device and the plurality of expansion devices includes a plurality of interface units controlling signal transmission/reception, and each multiplexing/demultiplexing section of each of working and protection sides multiplexing/demultiplexing a signal transmitted/received by each interface unit, the multiplexing/demultiplexing section of the working side of each expansion device is connected through a plurality of optical lines to the multiplexing/demultiplexing section of the working side of the main device, the multiplexing/demultiplexing section of the protection side of each expansion device is connected through a plurality of optical lines to the multiplexing/demultiplexing section of the protection side of the main device, the multiplexing/demultiplexing section of each of the working and protection sides of the main device includes a switching section switching an output destination of a signal input to each of the main device and the plurality of expansion devices according to an address of the signal, each of the plurality of expansion devices includes: the main device includes: