Title :
Time-division-multiplex electronic telephone exchange system for small pax
Author :
Toyoda, Kentaroh ; Arakawa, H. ; Yamamoto, Takayuki ; Nakamura, T. ; Hashimoto, Mime
Author_Institution :
Fuji Communication Apparatus Manufacturing Company, Ltd., Kawasaki, Japan
Abstract :
An experimental time-division-multiplex electronic telephone exchange on a 200-line 4-wire PAM (pulse amplitude modulation) system is described. The exchange is composed entirely of solid-state devices. The channel time is divided into four phases which are effectively used to reduce the number of circuit elements of the exchange. For reliable operation, common and multiplexed circuits are duplicated, and fault detection and change-over operation are explained.
Keywords :
Capacitors; Clocks; Delay lines; Generators; Logic gates; Radiation detectors; Road transportation;
Journal_Title :
American Institute of Electrical Engineers, Part I: Communication and Electronics, Transactions of the
DOI :
10.1109/TCE.1963.6373243
