... RJ45,RJ12,RJ11&BNC1.Functions:1.Can test correspondingly double-twisted cables 1,2,3,4,5,6, ... 248 tests RJ45 and BNC.ii.Test of double-twisted cables;switch on the power.(s is slow and remote ... tester.The lights of the main tester will turn on. ... cables are not connected,several lights will not turn on respectively.If less than two cables are conntected, ...