FOR STUDENTS AND TEACHERS
It is not the purpose of this page to be a comprehensive "one-stop" source of information, but rather to provide a starting point for the student or teacher to find more in-depth information on other pages in my web site or other web sites (such as AT&T) that are geared toward the student/teacher. Also, please don't write me asking me to do your research for you; this is my hobby and I do not have the time to do homework for students other than my own children although I will try to help when I can by directing you in the right direction. The various books, video tapes, etc. mentioned below are presented here only as a public service and is not to be construed as advertising - I receive no compensation from the publishers or producers of these items.
Books on Telephony - This page contains listings of various books, pamphlets, and other publications and reference materials on telephone related topics. Some of the books contain schematics of antique phones and beautiful color photographs. This is not an endorsement of any items shown here; rather it is a list compiled to aid visitors to this web site in locating further information on the subject of telephony. Click HERE to jump to the Books page.
(Public Broadcasting System - USA) "The American Experience" Home
Video - "The Telephone"
An interesting historical account of Bell's inventions of the telephone and the social impact of this and other inventions of this era. To view the front cover of the VHS tape box, click HERE; to view the back, click HERE. This tape is available from PBS in the USA. For more information including how to order from PBS, see http://www.pbs.org/wgbh/amex/telephone/filmmore/index.html.
NOTE: Due to the unfortunate reductions in staffing and funding of the archives department, responding to personal inquiries most likely will not be possible.
Requests must be submitted via U.S. Mail or FAX.
Mail: AT&T Archives
P.O. Box 4904
Warren, NJ 07059
FAX: (908) 756-2105
Email: Sheldon Hochheiser (AT&T archives historian)
Archives phone number: (908) 226-2386
Some of you may live near a telephone museum. This would be an excellent way to see the equipment first hand. Please see David Massey's Telephone Museum page to find a museum near you.
Bell System Science Experiments - A set of four wonderful kits produced by Bell Labs in the 1960's.
Educational Web Sites - The following sections are listings of other web sites I have found that contain good resources for researching the history and technology of telephony:
History of telecommunications and the inventors
Technology - How a telephone works, telephone related experiments
Who really invented the Telephone? Read this and come to your own conclusion!
AT&T Resources for Educators AT&T Learning Network - Learning Made Fun - Fantastic web pages for teachers and students!
Timeline of Telecommunications - A timeline I composed from several historical sources on the history of telecommunications.
AT&T Train of Thought - a chronological tour of AT&T history
Communication Timeline - by Irving Fang
School of Journalism and Mass Communication
University of Minnesota
Minneapolis, MN 55455
The Alexander Graham Bell Family Papers - at The Library of Congress 1862-1939
My History Links Page - For many more links that I found on the history of the telephone, the history of the Bell System, and information on Alexander Bell.
Alexander Graham Bell - Surfing the Net with Kids by Barbara J. Feldman, a former computer consultant and programmer, is the mother of two young children.
How Telephones Work - by Marshall Brain - In this edition of "How Stuff Works" we will look at the telephone device that you have in your house, as well as the telephone network it connects to. You can also explore a number of links to get into things in incredible detail!
Telephone Circuits - Technick Circuit Collections web page. Check this out for some neat telephone related circuits such as Telephone Tap, Telephone Recorder, Wireless Telephone Eavesdropper.
Telephone Communication Hardware - by Jaana Porra - A slide presentation of how the telephone system hardware works.
The AT&T Learning Network - Resources for Educators and Families. TCI Education Project. Virtual Academy
Tomi Engdahl's Telephone technology page - This is an EXCELLENT source of not only technical information but actual circuits you can build. You must visit this web site if you don't visit any others in this section.
I get requests for DTMF (Touch-Tone) decoder projects from students and hobbyist periodically. Although I don't have a schematic and parts list for building a complete project, I did find two manufactures of DTMF decoder integrated circuits that can be the basis of this project. Download the PDF data files by clicking on the following links:
Motorola MC145436A - a 14 pin chip
HOLTEK HT9170 - Available from Digikey for under $3.00 (USA)
Electronic Telephone Circuit
I have also received requests for how to build a modern analog telephone. The following chip from Motorola may be just what you are looking for:
Do you need to generate that special combination of AC and DC voltage that will ring a telephone bell?
The May 11, 2000 issue of the trade magazine EDN had an interesting article titled "Ring-tone generator uses high-Q filter" that should do the trick. It uses a Linear Technology Corporation LT1684 integrated circuit. To view this article in PDF format, click HERE. The particular article appears on pages 5 through 7 of that PDF file.
The data specification/application document for the Linear Technology Corporation LT1684 chip can be viewed or downloaded by clicking HERE.