Folder Bell System/WECo - General Publications

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Folder WEco Telephone Communication Systems 1970

V1: Early Systems and Station Equipment,  V2: Crossbar

Documents

pdf 1975_Bell System Switching Timeline - History 1878-1975 Popular

723 downloads

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Bell System Switching Timeline-History.pdf

1975_Bell System Switching Timeline - History 1878-1975

Time Line of Bell System Switching from a Bell System Training Manual

pdf Ameritech - The Hinsdale CO Fire Report And Conference Notes - 1989 Popular

262 downloads

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Ameritech_The_Hinsdale_CO_Fire_Challenge_Report_and_Conference_1989.pdf

Ameritech - The Hinsdale CO Fire Report And Conference Notes - 1989

280 pages.  This document was part of a two day seminar by Ameritec on the Central Office fire in Hinsdale IL. It was scanned as presented in the 3 ring notebook.

Includes  "The Hinsdale Challenge" - notes from a conference held April 10-11, 1989; and "The Hinsdale CO Fire - Final Report" Executive Summary, March 1989 (starts on page 234, tab 13 for reference in the conference notes). Contributed by John Novack.

pdf Boston1924 Bc Popular

855 downloads

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Boston1924_bc.pdf

pdf CO Prefixes Panel and Xbar Dial Buildings - Jul51 Popular

444 downloads

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CO_Prefixes_Panel_Xbar_Dial_Bldgs_Jul51.pdf

CO Prefixes Panel and Xbar Dial Buildings - Jul51

San Francisco, East Bay and Coast Divisions.  Pacific Telephone.  Contributed by Clint Gilliland.

pdf Evolution of Switching in the Bell System Popular

754 downloads

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EandS Bell System- Step-by-Step.pdf

Evolution of Switching in the Bell System

From A History of Engineering and Science in the Bell System: Switching Technology. Step by Step Improvements. WE installed AE switches until production started in 1926. SxS.

pdf ID Codes for No. 4 and Crossbar Tandem Offices - Jan61 ocr r Popular

469 downloads

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ID_Codes_No4_and_Xbar_Tandem_Offices_Jan61_ocr_r.pdf

ID Codes for No. 4 and Crossbar Tandem Offices - Jan61 ocr r

List of all No. 4 and Toll Xbar Tandems in the US, 1961. With ID codes used by the announcements. Contributed by Clint Gilliland.

pdf Sxs Bc Popular

890 downloads

pdf SXS System Relays 22x 24x 25x X75514 Jul54 Popular

389 downloads

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SXS_system_relays_22x_24x_25x_X75514_Jul54.pdf

SXS System Relays 22x 24x 25x X75514 Jul54

Contributed by Steve Flocke.  Scanning and OCR by John Novack.

pdf The Hinsdale Challenge 1988 Executive Summary Popular

416 downloads

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The_Hinsdale_Challenge_1988_Executive_Summary.pdf

The Hinsdale Challenge 1988 Executive Summary

Contributed by John Novack.

pdf Wire Spring Relays U UA Y X75375 Jul56 Popular

382 downloads

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Wire_Spring_Relays_U_UA_Y_X75375_Jul56.pdf

Wire Spring Relays U UA Y X75375 Jul56

Contributed by Steve Flocke.  Scanning and OCR by John Novack.

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Recent Contributors

Thanks for new documents from Chuck Hensley, John Gilbert, Chuck Batson, Alan David, Steve Flocke, Paul Wills, Dave Gruger, Jim Prather, John Stancliff, Sam Etler, John Novack, Clint Gilliland, Steve Cichorsky and Paul Fassbender.

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