The Network Linemeter is a versatile tool designed to test RJ45 computer interfaces and RJ11 telephone connectors. It features both fast and slow test switch functions and can quickly and automatically detect open circuit and short circuit statuses of network cables. This device is capable of identifying faulty RJ45, RJ11, and BNC cables. By connecting one end of the cable to the main unit and the other to the detachable remote unit, users can easily see how the cables are wired through the test LEDs, identifying short circuits, incorrect wiring, or crossover connections.