Automatic Telephone Systems

Automatic Telephone Systems

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At A is shown a wiring diagram with a table instrument at the main office and table instruments at the extensions. At Aa#39; Main Set. Extension 1. Extension Z. ( Suba#39;s.Table Telephone.) as FIgJIS. as 1:18.216. Baquot; Main SCt- Note- For one Extens/on, anbsp;...

Title:Automatic Telephone Systems
Author:William Aitken
Publisher: - 1923


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