In the telecommunications sector, the demand of non-telephone system such as the Internet expands, and needs of speeding up of the transmission rate have expanded. So the migration from metallic-cable-based communication to optical-cable-based communication has been advanced. But metallic cables and optical cables have coexisted to maintain the metallic cable equipment for telephone service. We have developed the simulation techniques diagnosing the status of supply and demand of communication infrastructure facilities using GIS.