Monoprice 139386 Cable Tester & PoE Finder - Continuity, Wiring

The Monoprice 139386 Cable Tester and PoE Finder is a practical, no-nonsense diagnostic tool designed for network technicians, IT professionals, and DIY installers who need to quickly verify cable integrity. It supports RJ45, RJ11, RJ12, and coaxial cables, checking each for pass, open, or short conditions using a bank of nine LEDs that clearly display the status of individual wire pairs. This makes it easy to catch faults like broken conductors, crossed pairs, or incomplete terminations before they cause connectivity problems.

Beyond basic continuity testing, the 139386 includes a PoE detection function that identifies active Power over Ethernet on network cables, distinguishing between IEEE 802.3af and IEEE 802.3at standards and indicating whether the power source equipment is delivering power via end-span (pins 12-36) or mid-span (pins 45-78). This dual functionality consolidates two common tasks into a single handheld device, reducing the number of tools needed in your kit. Its compact form factor makes it easy to carry on-site, and the detachable remote unit allows testing of installed cable runs between patch panels and wall jacks.