DocumentCode
1231193
Title
Cable Communications in Japan
Author
Kumagai, Daisuke
Author_Institution
Nippon Telegraph and Telephone Public Corp., Ibaragi, Japan
Volume
20
Issue
4
fYear
1972
fDate
8/1/1972 12:00:00 AM
Firstpage
707
Lastpage
717
Abstract
Japanese coaxial toll systems at the end of the fiscal year 1970 had grown to 29 980 km of coaxial cable (including both tubes of two-tube systems). In the next seven years, 1971 to 1977, the requirement is expected to be three times this capacity. Cable transmission systems fully utilizing modem electronics and communication engineering techniques are being developed to best meet this expected growth and to provide new wider band services.
Keywords
Circuits; Coaxial cables; Communication cables; Demand forecasting; Modems; Phase change materials; Power cables; Pulse modulation; Telegraphy; Telephony;
fLanguage
English
Journal_Title
Communications, IEEE Transactions on
Publisher
ieee
ISSN
0090-6778
Type
jour
DOI
10.1109/TCOM.1972.1091225
Filename
1091225
Link To Document