Design and Implementation of Telephone Line Detection System

In order to improve the quality of telephone service and solve the problem of low efficiency of telephone line fault, this paper designs a telephone line detection system. The system can take the initiative to detect the telephone line state, through the remote module timing dual tone multi-frequency dial to determine the line on and off state, through the analog voice to analyze the telephone line quality, to achieve the telephone line state active detection and fault location, easy to deal with the fault.