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 135
EPHON Y This illustration is based on a multi-office system. This office isNo. 4. The first three levels are trunked out to offices 1, 2, and 3, re-spectively. The A and F sections of the high bay occupy supports 1, 2and 3. Sections A and F low occupy supports 4, 5, and 6. Logically,sections B and… … End View Four+h Level TerminalsBent Together Fig. 103.— Multipling between terminals of first-selector banks. The first three levels are multipled to all the sections which areshown here. This is because the outgoing traffic is light enough to war-rant this grouping. The fourth level is local; it…
Telephone
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