Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems (1921)
Smith, Arthur Bessey, b. 1875, Campbell, Wilson Lee · New York : McGraw-Hill · leaf 29
ousand. Usuallythere arc as many second selectors for a 1000-line group as there areconnectors in that group. Ten 100-line boards, each having ten connec-tors, require 100 second selectors, whose banks form the 2-S for thethousand. Each junction 2-$ must receive traffic from all the thousands in… … Fig. 15.—Ten-thousand-line exchange (network form). There are as many first-selector junctions (1-S) as there are junctions(2-*S). Each junction (1-*S) consists of the banks of first selectors whichare multipled together. It is necessary that the traffic coming from the various thousandsshall be…
Telephone
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