NEW NETWORK SYSTEMS

NTT has constructed the Chiyoda Pilot Plant in the business district o f Tokyo to promote installations of Fiber To The Office (FTTO) as well as to enhance the efficiency of NTT's own operations through sophisti cated OAM systems. For the pilot plant, NTT has developed a Subscriber Cross-Connect Module (LXM) and introduced it in its central office in Chiyoda. Its cross-connect function has greatly increased the flexibi lity of FTTO operations. NTT has applied an Automated Main Distributio n Frame (AMDF) for metal cable jumpering in the central office, which connects the metal subscriber lines to switching systems automatically . The combination of AMDFs, LXMs and advanced OAM systems provides mor e efficient service provisioning. NTT has also introduced an Automatic Optical Fiber Operation Support System (AURORA) in the Chiyoda Pilot Plant. The main functions of AURORA are automatic testing and administ ration of optical fiber cables. For the electric supply systems, doubl e-routed power receiving panels and gas turbine emergency generators e nsure much higher reliability of the network systems. This paper outli nes the new network systems in the Chiyoda Pilot Plant.