Trend of telephone service. Development and function expansion of the new service. (3 ) . Nation-wide message dial ( tentative name ) as congestion relaxation and secured communication means in disaster.
Volume:
9
Issue:
12
Page:
66
Publication year:
Dec. 1997
JST Material Number:
F0050B
ISSN:
0915-2318
Document type:
Article
Article type:
解説
Country of issue:
Japan (JPN)
Language:
JAPANESE (JA)
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JST classification
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