Abstract
Nippon Telegraph and Telephone Corporation (NTT) is now promoting the Information Network System (INS) project, which is expected to be an important part of the basic infrastructure of the coming advanced information society. The purpose of INS is to provide various telecommunication services in a more economical and convenient manner by totally digitalized networks. The INS Model System-a pilot plant-was put into service in September 1984 in Mitaka City, which is adjacent to the Tokyo metropolitan area. This experiment is regarded as a "big" initial step toward the introduction of nationwide INS services. This paper reviews the system as well as service aspect of the experiment, where emphasis is laid on the actual operation status.
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