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(Nikkei BP Group)

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

  • NTT to Start General ADSL Service in Summer 2000
  • November 6, 1998 (TOKYO) -- Nippon Telegraph and Telephone Corp. said it will start a for-charge asymmetric digital subscriber line (ADSL) service.
    The service will start in limited areas of Japan in the summer of 1999 at the earliest. This trial service also aims to serve as market research. The company told Nikkei Communications that its general service will start by summer 2000.

    The interface between the user and the ADSL-link for the service, that is, the user interface that an ADSL modem will provide, will be 10BASE-T.

    Kenichi Narimiya, executive manager of NTT's Advanced Technology Planning Section, said, "We are still reviewing detailed terms and conditions for the service. We must first start actual commercial service to drive forward, although it may be in limited areas."

    NTT will announce its international purchasing standard for ADSL modems in December 1998 or January 1999. NTT's modem standard will be "G.992.2" (formerly G.lite), included in the ADSL standard specification defined by the International Telecommunication Union (ITU-T) Oct. 23.

    G.lite delivers data rates of up to 1.5Mbps downstream (from telephone company station to user premise) and up to 512kbps upstream. This specification is slower in speed than the other ITU-T standard, "G.992.1" (formerly G.dmt), but it is capable of transmitting data over longer distances for lower costs.

    Narimiya said the reason for NTT not to use G.dmt is that the company that the 6Mbps speed of G.dmt was not necessary, because the target customer of its ADSL service is home users.

    NTT will continue to work on service contents to provide and areas to cover, along with purchasing. Area coverage will be determined based on the results of the field trial that NTT is now conducting.

    "Initially, big cities like Tokyo, Osaka, Nagoya and other municipal capitals and their suburbs will be covered where demand for ADSL service is expected to be high," Narimiya said.

    At the start of the limited service in the summer of 1999, east and west local telephone companies split from NTT will provide a leased line service called "ADSL Access Line" (tentative name) between user premises and NTT's telephone station. The OCN (Open Computer Network) Service Division, which is a long distance telecommunication company, will provide Internet access service using the ADSL Access Line service.

    Related stories:
    � NTT to Launch ADSL Service in Summer 1999
    � Japan's First xDSL-Based Internet Service to Start in March

    (Nikkei Communications)

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    Updated: Thu Nov 5 18:23:50 1998 PDT