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Download ebook Practical Telephone Hand Book

Download ebook Practical Telephone Hand Book

Practical Telephone Hand Book & Guide to Telephonic Exchange. T Stith Baldwin

Practical Telephone Hand Book & Guide to Telephonic Exchange
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Author: T Stith Baldwin
Number of Pages: 28 pages
Published Date: 01 May 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
Format: Pdf
ISBN: 9781236219879
File size: 26 Mb
File Name: Practical.Telephone.Hand.Book.&.Guide.to.Telephonic.Exchange.pdf
Download Link: Practical Telephone Hand Book & Guide to Telephonic Exchange
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ...cause the Whole line to become noisy and difficult to talk Ner. By making connection through a repeating coil the disturbance is eliminated and a quiet line throughout is obtained. 0 Metallic Circuit Branch Board for Connecting Converging Metallic Lines.--Cnstructi' .A of the board indicates method of making connections. This board is designed for use in connecting converging lines where all the circuits to be connected are of metallie method of construction. The Toll Board, Fig. 43.--The toll board is intended for use in making connections between party lines. It is so arranged that incoming signals are received by ringer movements (strikers), mounted on the board. Immediately below each ringer movement is mounted a drop shutter which will fall when the ringer movement is energized. In this manner the ringer movement indicates whether or not the switchboard is wanted, and the drop shutter indicates which line is calling. The toll board is especially valuable in branch Exchanges where the board is located in a store or office and the operator has other duties besides change and toll board. For local0 lines having only one telephone on each line the toll board may be equipped with drops, thus forming a combination local exchange and toll board. Combined Telephone and Switchboard.--Instruments of this construction are intended for use in small branch exchanges and at points where a number of bridging lines converge. The telephone instrument is of regular bridging construction, as before described. The switchboard attachment is equipped with drops and jacks, operator's keys, special p.lugs and cords. q Diagrams 44 and 45 indicate method of installation.. Extension BeIIs, --An extension bell is merely the ringer movements and bells of a regular telep...

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