An ever-increasing number of today’s businesses, school districts and healthcare facilities are delving into Smart Ethernet switches with Power-over-Ethernet (PoE) technology—and reaping big benefits for their IP Surveillance networks.
PoE Switches: The Basics
With PoE technology, IP cameras are powered using the same LAN cable (typically a UTP Cat5e or better) that also carries the IP video data. Normally, at the center of the network is a PoE switch—a traditional Ethernet switch that has the additional capability of “injecting” PoE power (48VDC) on the LAN cable. A PoE switch will commonly have 4, 8, 16, 24 or 48 ports, although other variants are also available. This switch provides power and data to the IP camera on each port—using a single LAN cable—up to 330 ft. (100 m.) away.
PoE switches fall into three basic categories: unmanaged, smart and managed.
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