ITT Maintenance Manual - Telephone Tribute ITT Telephone Instrument Maintenance Manual. Courtesy of Robert A. Friedmar. Much of the information contained in this manual parallels similar equipment information for Western Electric, Stromberg Carlson, etc. since Western Electric licensed much of their technology and product specifications to companies like ITT who provided equipment to How to Rewire a Vintage Phone so it works Today! | The Art How to Rewire a Vintage Phone so it works Today! Previous / Next. February 3rd, Or it’ll make calls but can’t receive them. Or vice versa. It’s a messy business this phone wiring thing. They’re like Fiats. I gave up & went back to an old rotary. People asked to use my phone & the most common reaction was Wiring Diagrams - Telephone Collectors 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. Help With Rotary Phone Wiring | Electronics Forums says "8-58." This is clearly a diagram of the wiring block, though I have no idea what these letters stand for. Beside the wiring block to the right is a tape-wrapped electrical coil that almost certainly powers the ringer. The bells are below these, the low-tone beneath the wiring block and the high-tone beneath the coil. Stamped on the