DocumentCode
1432686
Title
Electronic exchange system. Part 1: Structure
Author
Flowers, T.H.
Author_Institution
Standard Telephones & Cables Ltd., London, UK
Volume
118
Issue
8
fYear
1971
fDate
8/1/1971 12:00:00 AM
Firstpage
963
Lastpage
971
Abstract
Continuing from another paper, the equipment for the structure of an electronic telephone exchange is described together with the reasons for the choices made. Analogue circuits are switched by p.a.m./t.d.m. (pulse-amplitude-modulation/time-division-multiplex) switches and p.c.m. (pulse-code-modulation) circuits by t.d.m. switches of the same kind. The use of t.d.m. switches profoundly influences the choice of processors for supervisory, signalling and other low-level functions, which, in turn, have some effect on the high-level common and unique common processors which are the subject of Pt. 2 of the paper.
Keywords
pulse amplitude modulation; pulse-code modulation; telephone exchanges; time division multiplexing; PAM; PCM circuits; TDM switches; analogue circuits; control section; electromechanical systems; electronic telephone exchange; high level processor; low level functions; processors; pulse amplitude modulation; pulse code modulation; signalling; structure; supervisory; switches; switching circuits; telephone exchanges; time division multiplexing; transmission circuits;
fLanguage
English
Journal_Title
Electrical Engineers, Proceedings of the Institution of
Publisher
iet
ISSN
0020-3270
Type
jour
DOI
10.1049/piee.1971.0194
Filename
5251519
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