NTT D20 Electronic Switching System
(last updated: 16-May-2015 09:31)
Periodical Articles
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"D-20 Electronic Switching System (Part 1) - System Description and
Objectives", JTR 16:4 Oct 1974 pgs 243-249 (also COSW pgs 222-231).
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"D-20 Electronic Switching System (Part 2) - Hardware and Software",
JTR 17:1 Jan 1975 pgs 14-23.
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"D-20 Electronic Switching System Service Experience", JTR 19:3 Jul
1977 pgs 183-187.
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"D20 Electronic Switching System Improvement", RECL 27:5-6 May-Jun
1979 pgs 391-398.
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"Improved Speech Path Equipment for D-20 Electronic Switching System",
RECL 27:5-6 May-Jun 1979 pgs 399-405.
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"Improved Central Processor for D20 Electronic Switching System", RECL
27:5-6 May-Jun 1979 pgs 406-414.
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"Improved Switching Program for D20 Electronic Switching System", RECL
27:5-6 May-Jun 1979 pgs 415-422.
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"Improved D20 Electronic Switching System", JTR 22:2 Apr 1980 pgs
98-106.