This is a multifunction RJ45 network cable tester. It is the design of the network cable (RJ45) test, and telephone (RJ11). It is cheap and easy to use. It works for network, telephone, cable with ...

These simple, inexpensive Ethernet jack/plug combinations used for loopback testing and to convert a standard Ethernet cable to a crossover cable are a no-brainer. Every network person should have one ...