The TPC-5 Cable Network (TPC-5 CN), an optical-fiber submarine cable system that spans a total distance of approximately 25,000 km and connects Japan, U.S. mainland, Hawaii, and Guam, will be put into service entirely on December 31, 1996 to form the first self-healing ring network trans-pacific region.

The construction of the TPC-5 CN began in November 1993. The southern route connecting Ninomiya (Kanagawa Prefecture), Miyazaki, Guam, Hawaii, and U.S. mainland (Morro Bay) was put into service in December 1995. The southern route, providing large-capacity, high-quality transmission channels, has been used, among other applications, for transmitting high-definition television broadcasts of the 1996 Summer Olympic Games in Atlanta.

The northern and southern routes between Ninomiya and U.S. mainland (Oregon and California) have been connected in Japan and the United States to form the first loop-shaped optical-fiber submarine cable system in the Pacific region.

The TPC-5 cable system will be connected to the TAT-12/13 (No. 12/13 Trans-Atlantic Cable Network) and with the APCN that spans across Southeast Asia and the SEA-ME-WE3 cable and the FLAG cable that connect Europe with Asia to create a large-capacity network linking countries around the world.

The TPC-5 cable system, constructed at the total cost of 134,700 yen million and providing 10 Gbps line capacity (equivalent to approximately 120,000 telephone circuits), employs a self-healing function and optical amplification developed by KDD to realize an extremely high degree of reliability compared to conventional submarine cables.

Because the TPC-5 cable system suits the needs of the multimedia age by offering large capacity with its optical-fiber cables, 70% of its line capacity has already been reserved. The system is expected to be used for the Internet, by multinational companies who will send massive data for international commercial transactions, and for television transmission services via cable.

Source: KDD