New User?

Read the articles under "Introduction"
in the black menu bar above.


Details for BTL History: Switching Technology - 1982 Opt R

BTL History: Switching Technology - 1982 Opt R
Name:BTL History: Switching Technology - 1982 Opt R

A History of Engineering and Science in the Bell System.  Switching Technology (1925 - 1975), 1982, 652 pages.  Contributed by Sam Etler, with post-processing by Clint Gilliland. 

Filesize: 33.78 MB
Filetype:pdf (Mime Type: application/pdf)
Created On: 03/17/2013 23:15
Hits:965 Hits
Last updated on: 03/17/2013 23:21

Recent Contributors

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.

Please add your name to this list!

Who's Online

We have 363 visitors online



Telephone Collectors International was incorporated under the laws of the state of Kansas on May 13, 1986. The goal of the organization is "to educate the public, as well as the members of the Corporation, regarding the history of telephony, the value of old telephones and related items, their collectability and preservation; to research telephone history and publish and provide literature thereon; to promote the public exhibition of old telephones and related items; and to promote common courtesies and guidelines for use by the public." Telephone Collectors International is recognized by the Internal Revenue Service as a 501(c)(3) organization, to which U.S. tax deductible contributions can be made.