Power over Ethernet, commonly called PoE, allows compatible network devices to receive electrical power over Ethernet cabling. This can simplify the installation of wireless access points, IP cameras, VoIP phones, and other devices because separate power adapters may not be required at each endpoint.
How PoE Works
A compatible switch provides both network connectivity and power to supported devices over Ethernet. The exact power level and negotiation method depend on the PoE standard and the device requirements.
What Should You Check?
Check the number of PoE ports, total PoE power budget, supported PoE standards, uplink capacity, switching capacity, VLAN features, management options, and environmental requirements. Do not select a switch based only on the number of ports.
PoE Budget Example
Suppose an office needs ten access points that each require up to 20 watts. The theoretical endpoint requirement is 200 watts, before allowing for design margin and other powered devices. The switch should therefore have a suitable total power budget rather than merely ten PoE ports.
PoE for CCTV
CCTV deployments may require many powered cameras. Businesses should consider camera power requirements, recording architecture, uplink bandwidth, VLAN segmentation, and resilience. High-resolution cameras can also generate significant network traffic.
Navas Technology
Navas Technology can help businesses select networking equipment based on device count, PoE requirements, bandwidth, segmentation, and future expansion. Navijin networking products can also be evaluated where they match the project's technical requirements.
Conclusion
PoE can make business network deployments simpler and cleaner, but the switch must be sized correctly. Evaluate power budget, standards, bandwidth, management, and growth rather than choosing solely by port count.
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