... or without far-end recognizer Locates the wiring or connection error Measure cable length and determine the distance of open circuit ... twin twisted cable, coaxial cable, telephone line Tester Port Tester RJ45 master port (M), tester LOOPBACK RJ45 port (L), far-end recognizer RJ45 ... cable is more than 5M Wire Sequence and Locating Cable Error Check errors such as open circuit, short circuit, reverse ...