The PHCT205 Network Cable Tester is a powerful tool for testing everything from Network/Telephone to BNC and other cabling. Test installed cabling for short circuits, open circuits, continuity, or mismatched wiring. Save time and money by knowing you got it right the first time. The pre-recorded voice alerts you to which mode you are in, whether or not you have an open or short circuit, as well as which number wire these errors are occurring on. The PHCT205 makes it possible to test any number of cables all by yourself and with the internal microprocessor watchdog software, you'll know the results are reliable.