Edge-Core ECS4110-28T, Руководство по управлению, Страница: 448 / 1514

C
HAPTER
14
| Basic Administration Protocols
Power over Ethernet
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Figure 243: Displaying LLDP Device Statistics (Port)
P
OWER OVER
E
THERNET
The ECS4110-28P/52P can provide DC power to a wide range of connected
devices, eliminating the need for an additional power source and cutting
down on the amount of cables attached to each device. Once configured to
supply power, an automatic detection process is initialized by the switch
that is authenticated by a PoE signature from the connected device.
Detection and authentication prevent damage to non-compliant devices
(prior to IEEE 802.3af).
The switch’s power management enables individual port power to be
controlled within the switch’s power budget. Port power can be
automatically turned on and off for connected devices, and a per-port
power priority can be set so that the switch never exceeds its power
budget. When a device is connected to a switch port, its power
requirements are detected by the switch before power is supplied. If the
power required by a device exceeds the power budget of the port or the
whole switch, power is not supplied.
Ports can be set to one of three power priority levels, critical, high, or low.
To control the power supply within the switch’s budget, ports set at critical
to high priority have power enabled in preference to those ports set at low
priority. For example, when a device connected to a port is set to critical
priority, the switch supplies the required power, if necessary by denying
power to ports set for a lower priority during bootup.
N
OTE
:
For more information on using the PoE provided by this switch refer
to the Installation Guide .