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(No.1 High-Tech News Site in Japanese)

  • Japan Telecom, Nihon Cisco Systems to Begin IP Network Trials
  • December 9, 1998 (TOKYO) -- Japan Telecom Co., Ltd., a common carrier, announced the broad outlines of an infrastructure it is developing for its PRISM (progressive and revolutionary integration of service media) telecommunications network services.
    Japan Telecom will conduct field trials with Nihon Cisco Systems K.K. starting in April 1999, and it plans to begin PRISM commercial services in April 2000.

    PRISM's backbone will be an Internet Protocol (IP) network designed to carry both data traffic, such as transmissions over the Internet, and voice traffic. This configuration will reduce backbone communication costs to less than a tenth of present costs, the company said.

    Japan Telecom plans to offer inexpensive IP telephony services via PRISM, and will fully replace its existing telephone switches over a period of 15 years.

    PRISM will carry such communication services as virtual private network (VPN) services for enterprises, Internet access, frame relay and IP multicast services.

    Japan Telecom said that the fees for the services are not yet decided. However, for 384kbps leased-line Internet access, the company is considering charging personal subscribers a monthly rate of 5,000 yen (US$40) up to a specified number of hours, with no data charge.

    In the field trials, the backbone portion of the network will comprise a ring configuration of large-scale routers from Cisco Systems Inc. of the United States. The ring will be a synchronous optical network (SONET) linking Tokyo, Nagoya and Osaka. Japan Telecom said the network will have a 2.4Gbps transmission speed over optical fiber using wavelength division multiplexing (WDM) equipment.

    Other devices will include voice-over-IP (VoIP) gateways for IP telephony services, and asynchronous transfer mode (ATM) switches for ATM and frame relay services.

    Transmission delays and congestion control will be tested during the trials, according to Japan Telecom.

    (Nikkei Communications)

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    Updated: Tue Dec 8 12:56:04 1998 PDT