Switch board cad blocks in AutoCAD, dwg file.

This Architectural Drawing is AutoCAD 2d drawing of Switch board cad blocks in AutoCAD, dwg file. A switchboard is a device used to connect telephone calls. Switchboards, which are now largely obsolete, consisted of a board of circuits and switches that needed to be manually adjusted for calls to be connected. The person who operated this kind of switchboard was called an operator or a switchboard operator.