1. Test twisted line pairs 1, 2, 3, 4, 5, 6, 7, 8 and G one by one (pair) and can distinguish which (pair) is wrong, short circuit and open circuit. 2. The ON switch is the normal test speed, "S" is the slow test speed, and M is the manual speed. Twisted pair test: turn on the power, insert the network cable plugs into the main tester and the remote tester respectively, the lights on the main unit flash one by one from 1 to G: Main tester: 1-2-3-4-5-6-7-8-G Remote tester: 1-2-3-4-5-6-7-8-G (RJ45) 1-2-3-4-5-6------(RJ12) 1-2-3-4----------(RJ11) If the wiring is abnormal, it will display as follows: 1. When a network cable such as #3 is disconnected, the #3 LEDs on the main tester and the remote test terminal do not light up. 2. When multiple lines are not connected, the lights do not light up. When the network cable is connected to less than two lines, the lights do not light up. 3. When both network cables are out of service, example 2 and 4 are out of service, the display is as follows: Main tester unchanged: 1-2-3-4-5-6-7-8-G The remote test terminal is: 1-4-3-2-5-6-7-8-G 4. When there are 2 shorts in the network cable, the main tester does not turn on, and the LEDs of the two shorted lines at the remote test end light on slightly. If there are more than 3 (including 3) When a short circuit occurs, the lights of all shorted wire numbers are off. If you are testing the patch panel and the wall base module, two matching jumpers (such as 110P4-RJ45) are required to lead to the tester. Coaxial cable test: if the cable is good, the BNC LEDs at both ends are flashing green at the same time