20.3 Description of PoE

PoE(Power over Ethernet) is a function that supplies power to networked devices using UTP cabling for data communication. PoE is used for network devices installed at locations where external power is not readily available. In PoE, the power supplier is called power sourcing equipment (PSE), and the power receiver is called a powered device (PD).

The Switch is a power supply device that conforms to IEEE802.3af/IEEE802.3at or IEEE802.3bt standards. Connecting Pre.STD powered devices is not supported.

The following table lists the compliance standards and power classes for the Switch.

Table 20-16: Compliance standards and power classes for the Switch

Model	Relevant standards	Port	Power class
AX2340S-24P4X	IEEE802.3af IEEE802.3at	1~24	Class0~Class4
AX2340S-24PH4X
AX2340S-48P4X		1~48
AX2340S-16P8MP2X	IEEE802.3bt	1~16	Class1~Class4
		17~24	Class1~Class6

<Structure of this section>

• 20.3.1 Assigning Power to Ports

• 20.3.2 Priority control of power supply

• 20.3.3 Operation when the power of the equipment is exceeded

• 20.3.4 PoE power supply distribution function

• 20.3.5 Notes on using PoE