Wiring Diagrams & Technical Library - TCI 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 www.telephonecollectors.info/library

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).

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library?format=html Wed, 25 Feb 2026 14:18:37 -0800 en-GB hourly 1 ITALTEL S62 https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/italtel-italy/14876-italtel-s62?format=html ITALTEL S62 Contributed by Nicola Giannarelli

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/italtel-italy/14876-italtel-s62?format=html Contributed by Nicola Giannarelli

]]> r.h.enthoven@infc.info (Remco E) ITALTEL - Italy Wed, 25 Feb 2026 14:18:37 -0800 SC 1215 - Wiring https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/stromberg-carlson-1/14849-sc-1215-wiring?format=html SC 1215 - Wiring 1215 Telephone, 2-10 System. Contributed by Jeremy Walters.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/stromberg-carlson-1/14849-sc-1215-wiring?format=html 1215 Telephone, 2-10 System. Contributed by Jeremy Walters.

]]> paul-f@verizon.net (Paul F) Stromberg Carlson Mon, 09 Jun 2025 17:53:27 -0700 AE L-1156 A0 Special 3-Key Cradle-type Monophone for AE PAX Trunk Transfer Equipment https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/automatic-electric-1/14800-ae-l-1156-a0-special-3-key-cradle-type-monophone-for-ae-pax-trunk-transfer?format=html AE L-1156 A0 Special 3-Key Cradle-type Monophone for AE PAX Trunk Transfer Equipment Automatic Electric, Keys with Orange/Green/Red Bands on Escutcheon. Often confused with the more common Cat. No. AA-22 instruments that are self-contained 2-line telephones for exchange use.
Contributed by Jim Hurtle with photos from Rick Saint.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/automatic-electric-1/14800-ae-l-1156-a0-special-3-key-cradle-type-monophone-for-ae-pax-trunk-transfer?format=html Automatic Electric, Keys with Orange/Green/Red Bands on Escutcheon. Often confused with the more common Cat. No. AA-22 instruments that are self-contained 2-line telephones for exchange use.
Contributed by Jim Hurtle with photos from Rick Saint.

]]> paul-f@verizon.net (Paul F) Automatic Electric Thu, 27 Feb 2025 14:03:33 -0800 AE L-1155 A0 Special 2-Key Cradle-type Monophone for AE PAX Trunk Transfer Equipment https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/automatic-electric-1/14794-ae-l-1155-a0-special-2-key-cradle-type-monophone-for-ae-pax-trunk-transfer-equipment?format=html AE L-1155 A0 Special 2-Key Cradle-type Monophone for AE PAX Trunk Transfer Equipment Automatic Electric, Keys with Green/Red Bands on Escutcheon. Often confused with the more common Cat. No. AA-22, AA-24, and AA-44 instruments that are self-contained 2-line telephones for exchange use.
Contributed by Jim Hurtle

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/automatic-electric-1/14794-ae-l-1155-a0-special-2-key-cradle-type-monophone-for-ae-pax-trunk-transfer-equipment?format=html Automatic Electric, Keys with Green/Red Bands on Escutcheon. Often confused with the more common Cat. No. AA-22, AA-24, and AA-44 instruments that are self-contained 2-line telephones for exchange use.
Contributed by Jim Hurtle

]]> paul-f@verizon.net (Paul F) Automatic Electric Sun, 24 Nov 2024 15:11:30 -0800 AE AA22 3-Key 2-Line Monophone Wiring https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/automatic-electric-1/14793-ae-aa22-3-key-2-line-monophone-wiring?format=html AE AA22 3-Key 2-Line Monophone Wiring AA-22 two-line. Contributed by Jim Hurtle, Rick Saint and Christopher Stewart.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/automatic-electric-1/14793-ae-aa22-3-key-2-line-monophone-wiring?format=html AA-22 two-line. Contributed by Jim Hurtle, Rick Saint and Christopher Stewart.

]]> paul-f@verizon.net (Paul F) Automatic Electric Thu, 21 Nov 2024 16:27:13 -0800 AE AA24 1-Key 2-Line Monophone Wiring https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/automatic-electric-1/14788-ae-aa24-1-key-2-line-monophone-wiring?format=html AE AA24 1-Key 2-Line Monophone Wiring AA-24-22 two-line. Contributed by Jim Hurtle.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/automatic-electric-1/14788-ae-aa24-1-key-2-line-monophone-wiring?format=html AA-24-22 two-line. Contributed by Jim Hurtle.

]]> paul-f@verizon.net (Paul F) Automatic Electric Thu, 10 Oct 2024 16:56:22 -0700 AE AA44 2-Key 2-Line Monophone Wiring https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/automatic-electric-1/14787-ae-aa44-2-key-2-line-monophone-wiring?format=html AE AA44 2-Key 2-Line Monophone Wiring AA-44-22 two-line. Contributed by Jim Hurtle.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/automatic-electric-1/14787-ae-aa44-2-key-2-line-monophone-wiring?format=html AA-44-22 two-line. Contributed by Jim Hurtle.

]]> paul-f@verizon.net (Paul F) Automatic Electric Thu, 10 Oct 2024 16:50:38 -0700 1500 Series Telephones, 1500D and 1554B, plus 2500D and 2554D https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/western-electric-1/1500-series/14783-1500-series-telephones-1500d-and-1554b-plus-2500d-and-2554d?format=html 1500 Series Telephones, 1500D and 1554B, plus 2500D and 2554D N.E. & W.E. TELEPHONE SETS 1500D, 2500D, 1554B, 2554B CONNECTED TO 25A3 & 35A3 TOUCH TONE DIAL PADS. Color-coded and contributed by Jeff Lamb.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/western-electric-1/1500-series/14783-1500-series-telephones-1500d-and-1554b-plus-2500d-and-2554d?format=html N.E. & W.E. TELEPHONE SETS 1500D, 2500D, 1554B, 2554B CONNECTED TO 25A3 & 35A3 TOUCH TONE DIAL PADS. Color-coded and contributed by Jeff Lamb.

]]> paul-f@verizon.net (Paul F) 1500-series Thu, 10 Oct 2024 08:26:36 -0700 500 Series Desk Telephones, 511 - 511C and 511D https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/western-electric-1/500-series/14782-500-series-desk-telephones-511-511c-and-511d?format=html 500 Series Desk Telephones, 511 - 511C and 511D 511 C/D. From 502-531-404, Feb71. Contributed by Jeff Lamb.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/western-electric-1/500-series/14782-500-series-desk-telephones-511-511c-and-511d?format=html 511 C/D. From 502-531-404, Feb71. Contributed by Jeff Lamb.

]]> paul-f@verizon.net (Paul F) 500-series Thu, 10 Oct 2024 08:22:59 -0700 Coin Collectors, 230-Type https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/western-electric-1/coin-collectors/14781-coin-collectors-230-type?format=html Coin Collectors, 230-Type WESTERN ELECTRIC - 230, 233 ( C, D, G, H ) & 234G COIN COLLECTORS WITH 685A SUBSCRIBER SET - COIN FIRST OPERATION. Color-coded and contributed by Jeff Lamb.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/western-electric-1/coin-collectors/14781-coin-collectors-230-type?format=html WESTERN ELECTRIC - 230, 233 ( C, D, G, H ) & 234G COIN COLLECTORS WITH 685A SUBSCRIBER SET - COIN FIRST OPERATION. Color-coded and contributed by Jeff Lamb.

]]> paul-f@verizon.net (Paul F) Coin Collectors Thu, 10 Oct 2024 08:20:48 -0700 AE 40 Desk Set - Schematic, Colored https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/automatic-electric-1/14767-ae-40-desk-set-schematic-colored?format=html AE 40 Desk Set - Schematic, Colored AE40 wiring. Annotated and wires displayed in AE Colors. Form D-53940, Straight Line Ringer - D-56441-A. Contributed by Jeff Lamb.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/automatic-electric-1/14767-ae-40-desk-set-schematic-colored?format=html AE40 wiring. Annotated and wires displayed in AE Colors. Form D-53940, Straight Line Ringer - D-56441-A. Contributed by Jeff Lamb.

]]> paul-f@verizon.net (Paul F) Automatic Electric Thu, 16 May 2024 18:24:15 -0700 FBI File 139-LA-500 Colin T Chambers https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/colin-chambers-files/14765-fbi-file-139-la-500-colin-t-chambers?format=html FBI File 139-LA-500 Colin T Chambers 1970s Colin T Chambers | FBI File 139-LA-500: Illicit Manipulation and Entry Into Telephone Communications; Activities of Phone Phreaks and Phone Sophistics"; OO: LA

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/colin-chambers-files/14765-fbi-file-139-la-500-colin-t-chambers?format=html 1970s Colin T Chambers | FBI File 139-LA-500: Illicit Manipulation and Entry Into Telephone Communications; Activities of Phone Phreaks and Phone Sophistics"; OO: LA

]]> r.h.enthoven@infc.info (Remco E) Colin Chambers Files Sun, 28 Apr 2024 17:22:57 -0700 WR C63.373 Sept42 - Desk Stand Connections https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/western-electric-1/desk-stands/14301-wr-c63-373?format=html WR C63.373 Sept42 - Desk Stand Connections Diagram extracted from the BSP. Provided by David M Willingham through www.classicrotaryphones.com/forum/

This is a diagram for connecting a sidetone desk stand, such as a 51-AL, to an anti-subset such as a 684A.

Note: This is *not* the more common NYT diagram, which has a limit of one station (no extensions) on the line, because of the permanently connected black condenser wire to the line.

Check other issues of C63.373 and addenda for other options.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/western-electric-1/desk-stands/14301-wr-c63-373?format=html Diagram extracted from the BSP. Provided by David M Willingham through www.classicrotaryphones.com/forum/

This is a diagram for connecting a sidetone desk stand, such as a 51-AL, to an anti-subset such as a 684A.

Note: This is *not* the more common NYT diagram, which has a limit of one station (no extensions) on the line, because of the permanently connected black condenser wire to the line.

Check other issues of C63.373 and addenda for other options.

]]> r.h.enthoven@infc.info (Remco E) Desk Stands Thu, 30 Mar 2023 12:04:02 -0700 WE 2504-BM to 2500-D or DM Conversion https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/western-electric-1/2500-series/14268-we-2504-bm-to-2500-d-or-dm-conversion?format=html WE 2504-BM to 2500-D or DM Conversion Detailed instructions with photos. Contributed by Jeff Lamb. Bookmarked by Paul Fassbender.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/western-electric-1/2500-series/14268-we-2504-bm-to-2500-d-or-dm-conversion?format=html Detailed instructions with photos. Contributed by Jeff Lamb. Bookmarked by Paul Fassbender.

]]> paul-f@verizon.net (Paul F) 2500-series Sun, 05 Mar 2023 19:42:37 -0800 Uniphone, Number 1 Type with British Post Office Type Dial - Annotated Wiring https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/northern-electric-northern-telecom/14267-uniphone-number-1-type-with-british-post-office-type-dial-annotated-wiring?format=html Uniphone, Number 1 Type with British Post Office Type Dial - Annotated Wiring Contributed by Jeff Lamb.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/northern-electric-northern-telecom/14267-uniphone-number-1-type-with-british-post-office-type-dial-annotated-wiring?format=html Contributed by Jeff Lamb.

]]> paul-f@verizon.net (Paul F) Northern Electric/Northern Telecom Sun, 05 Mar 2023 19:38:12 -0800 AE 43, Spacemaker - Annotated Wiring https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/automatic-electric-1/14266-ae-183-spacemaker-annotated-wiring?format=html AE 43, Spacemaker - Annotated Wiring Contributed by Jeff Lamb.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/automatic-electric-1/14266-ae-183-spacemaker-annotated-wiring?format=html Contributed by Jeff Lamb.

]]> paul-f@verizon.net (Paul F) Automatic Electric Sun, 05 Mar 2023 19:33:37 -0800 Uniphone Schematic with BPO Dial https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/northern-electric-northern-telecom/14191-uniphone-schematic-with-bpo-dial?format=html Uniphone Schematic with BPO Dial Northern Electric No. 1 Type Uniphone with British Post Office dial. Contributed by Jeff Lamb.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/northern-electric-northern-telecom/14191-uniphone-schematic-with-bpo-dial?format=html Northern Electric No. 1 Type Uniphone with British Post Office dial. Contributed by Jeff Lamb.

]]> paul-f@verizon.net (Paul F) Northern Electric/Northern Telecom Wed, 15 Feb 2023 12:27:22 -0800 North Electric 3H4 H-199 https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/north-electric-1/14162-north-electric-3h4-h-199?format=html North Electric 3H4 H-199 Contributed by Ed Burnett. Scan processed by Karl Brose.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/north-electric-1/14162-north-electric-3h4-h-199?format=html Contributed by Ed Burnett. Scan processed by Karl Brose.

]]> paul-f@verizon.net (Paul F) North Electric Wed, 19 Oct 2022 20:20:56 -0700 NE N1050-AP Desk Stand Local Battery Simplex https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/northern-electric-northern-telecom/14148-ne-n1050-ap-desk-stand-local-battery-simplex?format=html NE N1050-AP Desk Stand Local Battery Simplex https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/northern-electric-northern-telecom/14148-ne-n1050-ap-desk-stand-local-battery-simplex?format=html 4031jal@cogeco.ca (Jeff L) Northern Electric/Northern Telecom Sun, 31 Jul 2022 13:21:08 -0700 American Telecommunications ATC Character Telephones TouchTone Pad Wiring Connections https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/american-telecommunications-corporation-atc/14147-american-telecommunications-atc-character-telephones-touchtone-pad-wiring-connections?format=html American Telecommunications ATC Character Telephones TouchTone Pad Wiring Connections Wiring Connections for the touch tone pad enclosed in a white-coloured case, ATC Part No : 736422. Network : ATC Assembly No.: 736661-01.

]]> https://telephonecollectors.info/index.php/browse/wiring-diagrams-technical-library/american-telecommunications-corporation-atc/14147-american-telecommunications-atc-character-telephones-touchtone-pad-wiring-connections?format=html Wiring Connections for the touch tone pad enclosed in a white-coloured case, ATC Part No : 736422. Network : ATC Assembly No.: 736661-01.

]]> 4031jal@cogeco.ca (Jeff L) American Telecommunications Corporation (ATC) Sun, 31 Jul 2022 13:12:11 -0700