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 Emil Møllers Telefonfabrikker Denmark

Today "Emil Møllers telefonfabriker"still exsists as KIRK Telecom:

The KIRK telecom History (source

KIRK telecom A/S was established in 1991, but has a history within telecommunication dating back to the invention of the telephone.

read more

Folder International Telephone and Telegraph Company

International Telephone and Telegraph Company (Non-USA made Telephones)

Folder Kellogg Switchboard and Supply Company

Kellogg Switchboard and Supply Company ?(Including USA made ITT Telephones and Cortelco Telephones)

A vast amount of information about Kellogg, ITT American made telephones and Cortelco telephones is available on Mike Neale's Kellogg Page which can be found at

Folder RFT Fernmeldewerk Nordhausen VEB

R-F-T Fernmeldewerk Nordhausen VEB

Nordhausen, Leninallee 2a


was De-Te-We, West Berlin before May 1948


De-Te-We = Deutsche Telefon Werke


VEB = Volks Eigener Betrieb

Folder RTT Belgium

RTT was formed in 1930 by the Belgian government. It changed its name to Belgacom in 1991.


pdf American Electric X166 Wall Set Repair Schematic R Popular


Download (pdf, 255 KB)


American Electric X166 Wall Set Repair Schematic R

Contributed by Jeff Lamb.

pdf American Electric X166 Wall Set Schematic Popular


Download (pdf, 830 KB)


American Electric X166 Wall Set Schematic

Contributed by Jeff Lamb.

pdf Wiring Diagram -- Don't use this one! Popular


Download (pdf, 80 KB)


Wiring Diagram -- Don't use this one!
We're not sure what it's for or where it came from.  It uses some creative and seldom seen symbols, though.

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.

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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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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.