PoE (Power over Ethernet)

Power over Ethernet (IEEE 802.3af/at/bt) delivers DC power alongside data over standard Ethernet cabling, eliminating the need for a separate power supply at the device. PoE powers IP phones, Wi-Fi access points, IP cameras, and small-cell radios. Modern 802.3bt supports up to 90 W per port, enabling more demanding endpoints.

Categories: Radio Access NetworkProtocols and StandardsInternet and Routing

PoE in context

The radio access network is the layer where mobile devices attach to the operator's infrastructure. Attacks in this layer include IMSI catching, rogue base stations, downgrade attacks and jamming, and defenses hinge on mutual authentication, integrity-protected signaling and Open RAN supply-chain hygiene.

Telecom security is written into standards from 3GPP, GSMA, ETSI, IETF and ITU-T. Understanding which body owns which specification, and how the specs interlock (for example 3GPP TS 33.501 with GSMA FS.34 for 5G SBA security), is essential for both design and audit work.

To place PoE in the wider telecom-security picture, review LTE-Advanced (LTE-A), Handoff (Handover), TCP/IP, Telecom, WEP and DetNet.

Related terms

More from the TelcoSec Glossary

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