User's Manual

80-1
Chapter 80 PoE Configuration
80.1 Introduction to PoE
PoE (Power over Ethernet) is a technology to provide direct currents for some IP-based terminals (such
as IP phones, APs of wireless LANs and network cameras) while transmitting data to them. Such
DC-receiving devices are called PD (Powered Device). The max distance of reliable power supply provided
by PoE is 100 meters.
IEEE 802.3af standard is a new PoE standard, and an extension to the current Ethernet standard by
adding new items on power supply via network cables to IEEE 802.3 standard. It is also the first international
standard on power distribution. IEEE 802.3at standard is the upgraded version of IEEE 802.3af, the maximum
power of each port is 30W. It can meet the requirements of the higher power from PD device.
The application of PoE used to be in two areas: IP phone and 802.11 wireless network, however, along
with the development of this technology, many applications with more practical meanings have emerged
and benefited from PoE, such as video monitoring, integrated building management solution, and remote
video service booth. All these existing and predictably more of such applications arouse needs for switches
supporting PoE.
80.2 PoE Configuration
The PoE Configuration Task List:
1. Globally enable or disable PoE
2. Globally Set the Max Output Power
3. Globally set power management mode
4. Globally set non-standard PD detection mode
5. Globally enable or disable the allowed high-inrush current when nonstandard PD is powered
instantaneously
6. Enable or disable PoE on specified ports
7. Set the max output power on specified ports
8. Set the power priority on specified ports
1. Globally Enable or Disable PoE
Command
Explanation
Global Mode
power inline enable
no power inline enable
Enable/disable PoE globally.