These are a variety of telephone schematics for single-line and key telephones. The models such as 2500, 3554, 830, 2830, 831, 2831, 864, 2864 are industry standard types that are nearly the same as their Western Electric counterparts.
- ITT 2500/3554 Tone Desk and Wall Set
- Premier 2500 Desk Set
- Stromberg Carlson 1810 Key Phone
- Stromberg Carlson 830/2830/2854 Key Phone
- Stromberg Carlson 831/2831 Key Phone
- ITT 830 Key Phone
- ITT 2830 Key Phone
- ITT 864/2864 Key Phone
- AE 102A Key Phone
- AE 186 Key Phone
