Pyle Home PHCT55 Telephone Wire Cable Tester for Testing Continuity with Sender And Receiver Judge Continuity Of Cables Or Wires Track The Cables Or Wires And Diagnose The Break Point Receive The Tone Signal On The Cables Or Wires Identify The State In The Working Telephone Line (Clear, Ring, Busy) Send A Single Solid Tone Or A Dual Alternating Tone To The Cables Or Wires