Stromberg Carlson: United States

Rochester, New York, USA

Founded in 1894 when Alexander Graham Bell's patent for the telephone expired manufacturing primarily subscriber sets for sale to independent telephone companies. Insulators marked Stromerg Carlson have been found in Canada. It is likely they were not made by Stromberg Carlson, but for them by another manufacturer. Stromberg Carlson continued making telephone equipment including full PBX (Private Branch Exchange) switching equipment until 1991 when they were sold to Siemens and became Siemens Stromberg-Carlson. In 2006 the DCO line of Siemens Stromberg-Carlson was sold to GENBAND, a Next Generation Networking company based in Texas.

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