[Glossary](https://telxpress.com/glossary/) / Network # PoE (Power over Ethernet) **Power over Ethernet** (PoE) delivers power to devices such as phones, Wi-Fi access points, cameras and room controllers through the same network cable that carries their data, so no outlet is needed at the device. - Network - Updated October 11, 2026 - Written by the Telxpress advisory team 01 In depth ## What it is, why it matters and *what to ask a vendor* PoE is defined by IEEE 802.3 standards; successive versions (802.3af, 802.3at and 802.3bt) raised the power a switch port can deliver, from enough for a phone to enough for a pan-tilt camera, a large access point or a video bar. The switch (or a midspan injector) supplies the power, the device negotiates how much it needs, and a single cable does both jobs. For a growing business PoE is what makes phones, access points and cameras easy to place: wherever a cable can go, the device can go, and a battery backup on the switch keeps them running through a power cut. The catch is budget: every powered port draws from the switch's total, and a fully loaded switch with cameras and access points can exceed it. Ask your network partner for the total PoE budget of each switch against the devices planned, which PoE standard each device needs, whether the cabling is certified for the power and distance, and whether the switches are on battery backup. Ask what happens when the budget is exceeded, because some switches simply stop powering the last device plugged in. 02 Related terms ## Terms that usually come up *alongside it* - Network ### [Structured cabling](https://telxpress.com/glossary/structured-cabling/) Structured cabling is the standardized, organized system of copper and fiber cables, patch panels, racks and outlets that connects every phone, computer, access point, camera and room system in a building to the network. - Network ### [Cat6 vs Cat6A](https://telxpress.com/glossary/cat6-vs-cat6a/) Cat6 vs Cat6A is the choice between two grades of twisted-pair copper cabling; Category 6A supports higher-speed Ethernet over the full standard distance and resists interference better, at higher cost and a thicker cable. - Network ### [Wi-Fi 6, 6E and 7](https://telxpress.com/glossary/wi-fi-6-6e-7/) Wi-Fi 6, 6E and 7 are the most recent generations of wireless networking; each handles more devices in a crowded office with less delay, and 6E and 7 add the less congested 6 GHz band. - Security & compliance ### [NVR (network video recorder)](https://telxpress.com/glossary/nvr/) A network video recorder (NVR) is the appliance or server that receives video from IP security cameras over the network, stores the recordings and lets authorized staff review, search and export footage. 03 At Telxpress ## Where this shows up *at Telxpress* The pages and articles where this term does real work: what we advise, build and support. - Page ### [Business Networking, Firewalls & Managed Wi-Fi](https://telxpress.com/solutions/business-technology/networking/) Switching, routing, Fortinet firewalls, Ubiquiti and Cisco Meraki Wi-Fi and managed network services for offices that depend on reliable connections. - Page ### [Structured Cabling & Fiber Installation](https://telxpress.com/solutions/business-technology/cabling/) Structured cabling, fiber, racks and clean terminations for new builds, expansions and office moves across Orange County, installed by our own team. - Page ### [Business Surveillance Cameras & Access Control](https://telxpress.com/solutions/business-technology/surveillance/) IP cameras from Hikvision, access control and monitoring designed for your site, installed and supported locally with your network and phones. 04 Sources ## Public *references* The standard or law this definition rests on, as published by its owner. Fetched and checked on the review date above. - [IEEE 802.3bt-2018, Power over Ethernet over 4 pairs](https://standards.ieee.org/ieee/802.3bt/6749/) standards.ieee.org Next step ## Want This Applied *to Your Business?* Book a free 30-minute AI readiness consultation. You'll leave with three AI opportunities specific to your business, whether you work with us or not. [Book My Free Consultation](https://telxpress.com/book/) [Take the Free AI Readiness Assessment](https://telxpress.com/ai-readiness/) [Or call 24/7: (949) 861-4500](tel:+19498614500) Last reviewed: October 11, 2026. Published by Telxpress, Irvine, CA.