When conducting a local area network wiring and line repair, a network cable tester is usually used for connectivity testing. Network cable tester has a professional tester and a simple tester. The professional tester can not only test the connection between the network, the correct line of wiring, but also test the impedance of the twisted pair, near-end crosstalk, attenuation, return loss, length, etc., which can really bring a lot of convenience, but a few thousand Yuan, the price of 10,000 yuan is expected. So, only a simple network tester of several tens of dollars became the first choice for our non-professional network management personnel. However, when using the simple network tester, the cable connectivity test is often required, and one person master tester host, and the other person can assist in the other end of the network cable, which brings great inconvenience to the test work. The author has a simple method to solve this inconvenience in the test: replace the network cable terminal with switches or HUBs to achieve single test network connectivity. The specific method is as follows: first connect the information point network cable to be tested between the device (Note: You cannot turn on the switch power supply, otherwise it will damage the tester), then go to the terminal to connect to the transparent network tester And information socket. Open the simple network tester power supply, the local area network connectivity test can be done. Network communication is normal, 8 lights simple network tester will circulate the flow of 8 lamps, 4 lights simple network tester 4 lights are red and circulatated in water. There is no light, and the corresponding line is faulty. If you use Hub to replace the remote terminal, the network is connected normally, 8 lights simple network tester only 1, 2, 3, 6 lamp circulation flows, 4 lamps simple network tester only 1 && 2 and 3 && 6 lights Red, and the two lamps circulate the water on green, and the other lights are not bright. At this point, only 1, 2 and 3, 6 two sets of line pairs, 4, 5, and 7, 8 two sets of lines cannot be tested. Therefore, it is best to use a switch as a remote terminal for a complete communication test.
