The avoidable costs of uneconomic public payphone service shall be calculated in accordance with the formula as stated in Appendix 2.The revenue forgone for an uneconomic public payphone service shall be the service income as derived from a single public payphone booth.The following are the subsidy methods of Uneconomic Public Payphone service:1. Subsidize two uneconomic public payphone booths within a radius of two hundred meters in remote areas.2. Subsidize one uneconomic public payphone booth within two square kilometers.The competent authority (NCC) shall, in accordance with the actual requirement, adjust the subsidy amount of the installation of uneconomic public payphones in government bureaus, local schools, hospitals, prisons, military camps, train stations, airports, congress, and mountainous areas; the subsidy is not limited by the preceding paragraph.Appendix 2：Formula for the calculation of avoidable costs for uneconomic public payphone service.pdf