It is up to the technician to troubleshoot whether there is a configuration problem in the switch, a cable issue, or if power is being sent at all. The first two things can be accomplished using a laptop (if it has an RJ45 port) and a basic cable tester. The latter though is a little more. There are a variety of reasons why a PoE device might not be working. Lack of continuity due to poor terminations such as opens, shorts, and miswirings, as well of cable damage along a link, can obviously prevent any signal—data or PoE—from transmitting. Increased insertion loss due to heat rise or. Install, maintain and troubleshoot PoE devices and data cabling The PoE Tester is a multifunction tool that identifies the Class of the PoE source, injector type and power available to a PoE device regardless of cable length, cable quality or other factors. This blog will delve into how the POE functionality of testers can optimize cable tracing and line testing, improving. The LinkIQTM Cable+Network Tester is the testing solution to verify cable performance up to 10 Gb/s and solve network connectivity problems. LinkIQ validates cable performance using frequency-based measurements and provides distance to fault information along with a wire map of the cable under. PoE switches are very efficient tools to run devices over Ethernet.