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SF Bay Area Number Change August 10 1947 Ocr R SF Bay Area Number Change August 10 1947 Ocr R

Date added: 04/25/2013
Date modified: 04/25/2013
Filesize: 867.65 kB
Downloads: 916

Contributed by Steve Cichorsky.

Pacific Telephone Toll Supervisors Guide Sep46 Ocr R Pacific Telephone Toll Supervisors Guide Sep46 Ocr R

Date added: 04/25/2013
Date modified: 04/25/2013
Filesize: 7.66 MB
Downloads: 773

Contributed by Steve Cichorsky.

Associated Telephone THE MOUTH-PIECE Sept 1930 Ocr R Associated Telephone THE MOUTH-PIECE Sept 1930 Ocr R

Date added: 04/25/2013
Date modified: 04/25/2013
Filesize: 29.03 MB
Downloads: 687

Newsletter includes profiles of installations at Lexington, KY, Guernsey, WY, Pamona, CA and Erie, PA.  Contributed by Steve Cichorsky.

POEEJ 10-81 - The Evolution Of Switching Sys Architecture - A5 Ocr R POEEJ 10-81 - The Evolution Of Switching Sys Architecture - A5 Ocr R

Date added: 05/06/2012
Date modified: 05/06/2012
Filesize: Empty
Downloads: 55
Contributed by Steve Cichorsky.  OCR by Clint Gilliland.

General Telephone Company Of California Test Number Directory Extract General Telephone Company Of California Test Number Directory Extract

Date added: 11/10/2011
Date modified: 11/10/2011
Filesize: 348.19 kB
Downloads: 981
Contributed by Steve Cichorsky.

Atkinson Switchboard Cable Colours Atkinson Switchboard Cable Colours

Date added: 11/10/2011
Date modified: 11/10/2011
Filesize: 2.12 MB
Downloads: 1256
(Extract) Colour scheme of switchbalrd cables with 101 conductors. Also includes a nice drawing of "makeup of a typical switchboard cable" and text segment on cable waxing. Contributed by Paul Coxwell.

Evolution of the Strowger Automatic Telephone - Chart - ca. 1922 Evolution of the Strowger Automatic Telephone - Chart - ca. 1922

Date added: 10/19/2011
Date modified: 10/19/2011
Filesize: 113.08 kB
Downloads: 994
Contributed by Steve Cichorsky

Unification of the Manual and Automatic Telephone Systems - 1919 Unification of the Manual and Automatic Telephone Systems - 1919

Date added: 10/19/2011
Date modified: 10/19/2011
Filesize: 396.41 kB
Downloads: 923
Contributed by Steve Cichorsky

55may REA Voice Frequency Loading Trunk Cables TelEngConstManual Sec 431 I1 55may REA Voice Frequency Loading Trunk Cables TelEngConstManual Sec 431 I1

Date added: 08/06/2011
Date modified: 08/06/2011
Filesize: 5.69 MB
Downloads: 1080

Automatic Telephone Exchange Systems Automatic Telephone Exchange Systems

Date added: 02/25/2011
Date modified: 02/25/2011
Filesize: 27.17 MB
Downloads: 1079
March 1930. His Majesty's Stationery Office.  Part 14B.  Rural Automatic Exchanges - 25/100 lines, using units, Auto, No. 5 - Installation and Maintenance.  British Post Office UAX5.  About 28MB.  Contributed by Paul Coxwell.

The Faller Automatic System - 1902 The Faller Automatic System - 1902

Date added: 08/29/2010
Date modified: 08/29/2010
Filesize: 10.39 MB
Downloads: 1277

Panel Switching System - Chapter V Rss Panel Switching System - Chapter V Rss

Date added: 04/06/2010
Date modified: 04/06/2010
Filesize: 10.84 MB
Downloads: 1085

No. 5 Crossbar (Chapter Three) Rssp No. 5 Crossbar (Chapter Three) Rssp

Date added: 04/06/2010
Date modified: 04/06/2010
Filesize: 4.3 MB
Downloads: 1244

Crossbar Systems   Incomplete Crossbar Systems Incomplete

Date added: 04/06/2010
Date modified: 04/06/2010
Filesize: 4.79 MB
Downloads: 1473

Billing AMA Toll Billing AMA Toll

Date added: 12/17/2009
Date modified: 12/17/2009
Filesize: 687.27 kB
Downloads: 1208

Mechanized Billing of AMA Toll Messages

SATT AIEE Paper SATT AIEE Paper

Date added: 12/15/2009
Date modified: 12/15/2009
Filesize: 2.85 MB
Downloads: 1622

4A Toll Crossbar 4A Toll Crossbar

Date added: 11/19/2009
Date modified: 11/19/2009
Filesize: 3.38 MB
Downloads: 1773

Telephony (book), 1938, Tones And Ringing Telephony (book), 1938, Tones And Ringing

Date added: 10/28/2009
Date modified: 11/12/2009
Filesize: 6.24 MB
Downloads: 951

T. E. Herbert, 1938 - pp 33-35: Tones Provided in an Automatic Exchange, pp 181-189: Ringing Machines.

Chapius, The Strowger System Chapius, The Strowger System

Date added: 10/28/2009
Date modified: 11/12/2009
Filesize: 910.69 kB
Downloads: 1380

Extract from Chapius book including: Beginnings of Automatic Telephony, A. B. Strowger's Invention.

Telephony (book), 1938, Ch. VII - Multi-Exchange Areas Telephony (book), 1938, Ch. VII - Multi-Exchange Areas

Date added: 10/28/2009
Date modified: 11/12/2009
Filesize: 14.71 MB
Downloads: 1075

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Thanks for new documents from David Gruger, Jeff Lamb, Walt Aydelotte, Dennis Hock, Steve Flocke, Paul Wills, Sam Etler, Fred Haynes, John Novack, Clint Gilliland, Steve Cichorsky and Karl Brose.

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