http://www.cablesupply.com Jim from explains how to use a basic ethernet LAN tester. You can purchase this tester here: http://cablesupply.com/Tools/Testing-Equipment/LANtest-Network-Modular-Cable-Tester.html This tester will test the basic wire-mapping and continuity of a cable. The vast majority of cabling issues are caused by miswiring or a lack of continuity. Questions: techsupport@cablesupply.com
