A PoE (Power over Ethernet) switch provides both power and data over a single cable, simplifying deployments of APs, IP phones, and cameras. PoE network switches reduce cabling costs, improve flexibility, and enable enterprise networks to scale easily with wireless and IoT devices.
What is a PoE network switch?
A PoE (Power over Ethernet) switch combines power delivery and network connectivity into one Ethernet cable. Instead of running separate electrical wiring, the switch supplies devices like Wi-Fi access points, VoIP phones, or IP cameras with both power and data.
PoE follows IEEE standards:
- 802.3af (PoE): up to 15.4W per port.
- 802.3at (PoE+): up to 30W per port.
- 802.3bt (PoE++ / UPoE): up to 60–90W per port for devices like PTZ cameras or digital signage.
Why are PoE switches important?
- Reduced costs: No need for electricians or extra cabling.
- Flexibility: Install APs or cameras in ceilings or remote locations without outlets.
- Scalability: Supports IoT expansion with minimal effort.
- Centralized management: Power cycling devices via switch interface saves time.
Types of PoE switches
- Unmanaged PoE switches: Simple, plug-and-play for small offices.
- Managed PoE switches: Offer VLANs, QoS, and monitoring.
- Layer 2+ / Layer 3 PoE switches: Combine power with advanced routing.
- High-power PoE (UPoE): Designed for smart lighting, kiosks, and industrial IoT.
Use cases for PoE switches
- Enterprise Wi-Fi: Powering multiple APs across office floors.
- Surveillance: Running IP cameras without local power.
- VoIP phones: Desk phones powered by PoE reduce clutter.
- Smart buildings: IoT sensors, lighting, and badge readers powered directly from the network.
Conclusion
PoE switches are essential for modern enterprises, powering devices efficiently while reducing infrastructure costs. With PoE-capable models, Sundray Technology helps businesses deploy APs, cameras, and IoT systems at scale without extra cabling.
Similar Terms
FAQs about PoE Network Switches
Yes, standards-based PoE negotiates with the device before supplying power, preventing damage to incompatible hardware.
Standard Ethernet limits PoE runs to 100 meters. Beyond that, PoE extenders or fiber solutions are needed.
Yes. Non-PoE devices simply draw data only, while PoE devices negotiate power automatically.
