Tutorials in Telephone and Electronic Technologies - Links to some
nice web sites for learning about the technical aspects of telephony and
PBX's and Central Offices - A technical history of Step-by-Step, Crossbar,
Panel, ESS, and other switching systems.
Line Simulators - Description and photos of various simulators and
small PBX systems. Featured telephone line simulator is the Teltone
TLS-4 (and TLS-4A) with high resolution color digital photos of circuit board.
- Telephone line color-codes
for home wiring in the USA:
1 - Image 2
Telephones: How to Repair and Rebuild Them" by
Dr. Jeffrey Race. "Twenty years ago I wrote a booklet OLD
TELEPHONES: HOW TO REPAIR AND REBUILD THEM, which offers 22 schematics and
20 pages of text detailing repair and restoration of historic magneto and
common-battery instruments and their conversion to use on modern lines. With
the evolution of technology I have re-casted it as a downloadable PDF
document and put it up on a website I operate. I also have many other
useful downloads at various other locations on this
website." - Dr. Jeffrey Race, ATCA #63, President Cambridge
- ITT Telephone Instrument Maintenance Manual
- Donated by Robert A. Friedmar.
Table of contents and the first two out of three chapters have been scanned so far.
Chapter three (the final chapter) will be scanned in sections and the sections made
available as time permits.
- GTE and
Automatic Electric web page - This page is a result of file contributions
from Jack Decker and Mike Elmore. More files of scans will
be added as he has time to do them. For AE schematics, see Mike Elmore's web site (http://www.geocities.com/melmore99/).
Schematics - A sample of a Kellogg schematic found on Mike Elmore's web site (http://www.geocities.com/melmore99/).
Please visit his site for the complete collection.
Audel's Chapters on Telephones - From a book published in 1924 - A big
thanks to Frank Wilsey who contributed these scans for this website.
Carlson Schematics - My personal collection. More can be found on
Mike Elmore's web site (http://www.geocities.com/melmore99/).
- Signal and Circuit Conditions - A
technical information page containing specifications and sample sound files for dial tone,
busy tone, ring tone, re-order (all trunks busy), etc. plus recordings of obsolete
switching equipment signaling sounds. Also contains off-hook/on-hook line resistance
specifications and rotary (pulse) dialing specifications.
- CIC Lucent Home (Lucent
Technologies) has a web site with a search feature for locating and purchasing drawings,
documents, products, area code directory, and other online libraries.
- Telephone Technical Links on the World