What is POE(Power over Ethernet)?

Power over Ethernet (PoE) is a networking feature defined by the IEEE 802.3af and 802.3at standards. PoE lets Ethernet cables supply power to network devices over the existing data connection.
PoE-capable devices can be power sourcing equipment (PSE), powered devices (PDs), 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 money on purchasing and running cable for networking equipment and VoIP phones.
PoE makes installing or expanding a network much simpler and cheaper 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.

How to select video conference cameras with POE function?

Here JJTS would like to share our Multi-interface IP camera POE pics for you.