Folder Wiring Diagrams & Technical Library

Click here for the Wiring Diagrams & Technical Library list view.

by Manufacturer and Model

Hint: Also check BSPs, GSPs and technical bulletins for wiring options and detailed technical information. Search for the phone model and "wiring" or "schematic." (e.g. North 5H6 wiring)

This is a library of basic schematics, wiring diagrams and other information that can be useful to anyone interested in restoring or repairing vintage telephone equipment. Generally, the information in the Library is limited to equipment that was made prior to 1980.

If you can't find what you are looking for, use the Contact Us option here or on the Menu Bar. We will make an attempt to locate it and add it to the library.

The Wiring Diagrams & Technical Library can easily be found through the following link

Hint: Clicking on Browse Library / Wiring Diagrams in the Menu Bar at any time gives a quick reference list of popular manufacturers.

To see all manufacturers, browse the complete list below.

Click here for the most important German telephone schematics (W28, W36, W38, W48, W58, W63a).


Folder Allen Tel Products
Folder American Telecommunications Corporation (ATC)
Folder Automatic Electric
Folder Connecticut Telephone and Electric
Folder Emil Møllers Telefonfabrikker Denmark
Folder Ericsson
Folder Garford North Sumpter
Folder Garford Telephones
Folder General Information
Folder International Telephone and Telegraph Company
Folder Kellogg Switchboard and Supply Company
Folder Leich
Folder Military German
Folder Military United States
Folder North Electric
Folder Northern Electric/Northern Telecom
Folder PMG Australia
Folder PTT France
Folder PTT the Netherlands
Folder RFT Fernmeldewerk Nordhausen VEB
Folder RTT Belgium
Folder Russia
Folder Shanghai Telecommunications Factory (Formerly IT&T
Folder Siemens
Folder Stromberg Carlson
Folder Sumter Telephones
Folder Telefon Fabrik Automatic
Folder Western Electric


pdf American Electric X166 Wall Set Repair Schematic R (130 downloads) Popular Download (pdf, 255 KB)
pdf American Electric X166 Wall Set Schematic (131 downloads) Popular Download (pdf, 830 KB)
pdf Wiring Diagram -- Don't use this one! (4592 downloads) Popular Download (pdf, 80 KB)

New User?

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

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.

Please add your name to this list!

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Many menu choices are hidden until you mouse over the menu.  If you want help getting started, see the links under the word "Introduction" in the Menu Bar.
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Library INBOX.
The INBOX may hold some files that have been submitted but not fully processed into the Library.  These are often topics of current discussion on the TCI Listserv.
Finding BSPs.
Many BSPs are currently only identified by BSP number. If a text search doesn’t produce a BSP, try looking in one of the many BSP index documents to find a BSP number for the product you are researching just as you would do if referencing a paper library of the BSPs. Then enter the BSP number in the search box.