Planet’s Power over Ethernet Tester is an easy-to-use PoE diagnostic adapter for network installers, companies and even home users to conveniently identify the existence of Power over Ethernet on application networks. It’s designed to detect if the 802.3af/at PoE voltage runs over the UTP cable and identify the type of PSE (Power Source Equipment) for troubleshooting.
The PoE tester provides two LED’s for easy PSE mode identification. A Power over Ethernet system comprises of a PSE (Power Sourcing Equipment) and a PD (Powered Device). The PSE is a device that will provide power in a PoE setup. There are two types of PSE, Mode A and Mode B. The PSE may either be a Mode A, end-span PoE switch or a Mode B, mid-span PoE injector.
Refer to above PDF Data sheet