Q&A

摘要

I do quite a bit of CAT-5/6 cable installations for telephone and data networks. Although I teach my crew to be very careful when attaching a RJ-45 plug or jack, invariably we end up with a few cables with crossed, open, or shorted circuits. There are quite a number of LAN/telephone circuit testers on the market which are able to identify which pair or wire is shorted, crossed, or open, but the biggest problem and time waster is knowing which "end" needs to be fixed. One of Murphy's Laws states that we will spend 20 minutes going to and inspecting the wrong end.