... ,4,5,6,7,8andG,meanwhile can judge wrong connection,short circuit and open circuit.2.NS-4688tests BNC,RJH and ... 2-5-6-7-8-G4.If two cables are short circuited,neither of the corresponding lights ison of the remote ... main tester remains unchanged.If three cables,including three,are short circuited,none of the corresponding liaghts is on.iii.If ... ,BNC turns on when the cable works. network tester TP-NT-003