Summary of more important changes that have taken place, together with various considerations which have led to their adoption; notes on auto manual board; coder call indicator (C.C.I.) equipment; straightforward junction system; through calls; multiple-fee calls; automatic registration; satellite working: coin-box multiple fees, miscellaneous traffic from ordinary subscribers, and from coin box lines.
Manchester automatic telephone system
Post Office Elec. Engrs. -- Jl
Post Office Electrical Engineers' Journal ; 23 , Part 2
1930
13 pages
14 Figs.
Aufsatz (Zeitschrift)
Englisch
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