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IEEE 802.3 (PoE) standard

The IEEE 802.3 (PoE) standard parameter of the cable tester indicates that the device can verify and diagnose the function of power over Ethernet cable. Power over Ethernet technology, abbreviated PoE, allows both data and electricity to be sent over a single data cable to power end devices such as IP cameras, wireless access points, or phones for Internet calling. To ensure that devices from different manufacturers work together safely and reliably, there is an international standard, IEEE 802.3, that defines exactly how such power should work. A tester with this feature can detect if PoE power is present on a cable, measure its voltage and available power. It can also identify which specific standard is being used, such as the older 802.3af, the more powerful 802.3at (also referred to as PoE+), or the most powerful 802.3bt (PoE++). This capability is critical for technicians during installation or troubleshooting because it allows them to verify that the power source, such as a switch, is delivering sufficient power to the connected device and that the cabling is in order.

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