.Multi-function .High precision .Intelligent system .Simple operation .Humanized ... of STP/UTP 5E /6E cable, telephone line, BNC cable, USB signal line;2. Use crosstalk test to solve the ... ;4. Judge the open circuit point, and the net line crystal head open point ( left, right or middle ); ... Automatically time-delay shutdown function;5. It can be self-test and have a function that can automatically adjust ...