Power over Ethernet (PoE)
PoE is a technology for wired Ethernet LANs (local area networks) that allows the electrical current to be carried by the data cables rather than by power cords. With PoE, there are fewer wires to install the network. For example, a digital security camera normally requires a network connection to be able to communicate with video recording and display equipment and a power connection to deliver the electrical power the camera needs to operate. However, if the camera is POE-enabled, only the network connection needs to be made, as it will receive its electrical power from this cable as well.
POE - Benefits
Time and cost savings - PoE reduces the time and expense of having electrical power cabling installed.
Flexibility - without being tethered to an electrical outlet, IP cameras and wireless access points can be located wherever they are needed most and repositioned easily if required.
Safety - POE delivery is intelligent, and designed to protect network equipment from overload, underpowering, or incorrect installation.
Reliability - POE power comes from a central and universally compatible source, rather than a collection of distributed wall adapters. It can be backed-up by an uninterruptible power supply, or controlled to easily disable or reset devices.
Scalability - Having power available on the network means that installation and distribution of network connections is simple and effective.
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