Power Over Ethernet:
PoE lets Ethernet cables supply power to network devices over the existing data connection. PoE-capable devices can be power sourcing equipment, powered devices, or sometimes both. The device that transmits power is a PSE, while the device that is powered is a PD. Most PSEs are either network switches or PoE injectors intended for use with non-PoE switches. Common examples of PDs include VoIP phones, wireless access points, and IP cameras.
What are the benefits of PoE?
• Because PoE allows you to use one cable for both power and data transmission, PoE saves you cost on purchasing and running cable for networking equipment and VoIP phones.
• PoE makes installing or expanding a network much easily understood and inexpensive in buildings where it is too expensive or inconvenient to install new power lines.
• Using PoE lets you mount devices in places where it would be impractical to install power, such as drop ceilings.
• Using PoE can reduce the number of cables and electrical outlets needed in a crowded equipment room or wiring closet.
What Is a PoE Injector?
A PoE injector, also called midspan or PoE adapter, can be implemented to make a non-PoE compatible switch work with PoE devices by powering compliant devices over a single Ethernet cable such a as Cat5e, Cat6, Cat6a, etc. It is perfect for low-power devices that need to be set up in locations where a power outlet is unavailable. It thus enables more flexibility by offering access to install devices in hard-to-reach areas, with a minimal impact on existing structures and budget.