Title :
Communications: Electronic telephone switching in Japan: For Nippon Telegraph and Telephone, D-10 and D-20 are ¿household¿ words, as is ¿ESS¿ in the U.S.
Author_Institution :
Nippon Telegraph and Telephone Co., Tokyo, Japan
fDate :
6/1/1976 12:00:00 AM
Abstract :
Since 1964, NTT´s (Nippon Telegraph and Telephone) Electrical Communication Laboratory has worked on the development of electronic switching systems with four manufacturing companies. The consortium has produced the D-10 system for large offices, the D-20 system for small and medium offices, and the D-10-R1 remote control system for extensions in existing offices.
Keywords :
electronic switching systems; telephone switching equipment; electronic switching system; hardware; software; speech path network; telephone switching; traffic density; Electronic switching systems; Hardware; Maintenance engineering; Process control; Software; Switches;
Journal_Title :
Spectrum, IEEE
DOI :
10.1109/MSPEC.1976.6369225
