CMS:803C Ringing and Tone Plant

The 803C Ringing and Tone plant is an exhibit that demonstrates how ringing and tones were created in large metropolitan areas in the Bell System. It consists of a P-type motor generator set salvaged from the West office in Seattle, and a control board that served the Pearl St. office in Hartford CT. This Pearl St. control board and its associated motor generators were salvaged, and later donated by Jim Day, of West Haven, CT. Although the board is present in the museum, its associated ringing machines are in storage.