The impact of ISDN on Japan´s telecommunications power system

Author

Sugiura, Toshiyuki ; Ogata, Tsutomu ; Koyashiri, T.

Author_Institution

Appl. Electron. Labs., NTT, Tokyo, Japan

fYear

1988

fDate

30 Oct-2 Nov 1988

Firstpage

17

Lastpage

24

Abstract

The authors describe the state of ISDN (integrated services digital network) services in Japan and discuss issues concerning power supply systems suitable for the ISDN age. A distributed power supply system has been developed to solve the problems posed by centralized systems in telephone offices when ISDN systems are adopted. A compact, thin board-mounted DC-DC converter for a digital switch system has been developed. In addition, a small-size constant-current DC-DC converter has been developed for the metallic subscriber-loop system. A small-capacity uninterruptible power unit with back-up batteries, for use on subscriber´s premises, has been developed for the optical-fiber subscriber loop systems. An extremely lightweight, high-voltage DC-DC converter for a communications satellite has also been developed

Keywords

ISDN; power convertors; power supplies to apparatus; DC-DC converter; ISDN; Japan; communications satellite; power convertors; power supplies to apparatus; power supply systems; subscriber-loop system; telecommunications power system; telephone offices; uninterruptible power unit; Batteries; Communication switching; DC-DC power converters; ISDN; Optical switches; Power supplies; Power systems; Switching converters; Telephony; Uninterruptible power systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Energy Conference, 1988. INTELEC '88., 10th International

Conference_Location

San Diego, CA

Type

conf

DOI

10.1109/INTLEC.1988.22319

Filename

22319