Lantronix SISPM1040-xxxx-L3 Web User Guide
33856 Rev. A https://www.lantronix.com/ 77
PoE Management
Power Over Ethernet is used to transmit electrical power, to remote devices over standard Ethernet cable. It could for example
be used for powering IP phones, wireless LAN access points and other equipment, where it would be difficult or expensive to
connect the equipment to main power supply.
PoE Management > PoE Configuration
This page lets you view and set current PoE port settings; it also displays the primary power supply output.
PoE Configuration
Reserved Power determined by: There are three modes for configuring how the ports/PDs may reserve power.
Class mode: In this mode each port automatically determines how much power to reserve according to
the class the connected PD belongs to and reserves the power accordingly. Four different port classes
exist and one for 4, 7, 15.4 or 30 Watts. In this mode the Maximum Power fields have no effect.
Allocated mode: In this mode the user allocates the amount of power that each port may reserve.
The allocated/reserved power for each port/PD is specified in the Maximum Power fields.
LLDP-MED mode: This mode is similar to the Class mode expect that each port determines the amount
power it reserves by exchanging PoE information using the LLDP protocol and reserves power
accordingly. If no LLDP information is available for a port, the port will reserve power using the class
mode. In this mode the Maximum Power fields have no effect.
For all modes: If a port uses more power than the reserved power for the port, the port is shut down.
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