Siam Fiber Optics Co.,Ltd. has been set up in response to growing demand for optical fiber cable in Thailand, to serve a number of national-level telecommunications development projects being implemented by The Telephone Organization of Thailand (TOT), The Communications Authority of Thailand (CAT), Telecom Asia (TA) and other private sectors. Siam Fiber Optics Co.,Ltd. is a joint venture among four internationally recognized corporations from Thailand and Japan.