General Information

Colors
Colors and Suffix Codes for Western Electric, Kellogg/ITT and Northern Electric telephone sets. colorcodes.pdf  
Western Electric Color Code Chart. wecolorchart.jpg Note 1
Western Electric Color Code Chart as a PDF. chart.pdf 984 KB
Color Code Tables for Automatic Electric Type 80D and Type 80E Sets 80decolors.pdf Note 2

Paul Fassbender's site also serves as an excellent source of telephone color information:

www.paul-f.com/color.htm
www.paul-f.com/wecolors.htm
www.paul-f.com/AEcolors.htm

Note 1: Original Scan from David Massey. Check out www.bellsystemmemorial.com for more valuable information.

Note 2: From information provided by Melvin Ward.

Troubleshooting Techniques
How to troubleshoot INDUCTIVE NOISE in telephone plant. noise.pdf Note 1

Note 1: An article by Keith Cheshire

Siecor Half-Ringer unit
Half-Ringer Description HRInfo.pdf Note 1
Half-Ringer Electrical Values HRingRC.pdf Note 1

Note 1: Material provided by Roger Conklin.

The Vincent Rare Gas Relay
Instructions vincent.pdf Note 1

Note 1: Scan provided by Steph Kerman.

Modular Plug and Jack Wiring
Modular Connector Pin Assignment jackplug.pdf  
Six Position Plug 6-pos.pdf  
Eight Position Plug 8-pos.pdf  
USOC Ordering Codes USOC.pdf 460 KB

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Revised 05/28/09