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2.2 PoE power supply function
PoE power supply function operation overview
Ports 1 to 24 support IEEE802.3af PoE. This function allows for power supply of up to 15.4 W through
each port and 124 W in total through the Switching Hub.
PoE LIM. LED (PoE limit)
Off:
Supplying power in the range from
0 to 117 W.
Green Light: Supplying power in the range from
117 to 124 W.
Orange Blink: A single port's power supply is
exceeding the upper limit, or the
total power supply of the
Switching Hub is exceeding 124 W.
Power supply while the PoE LIM. LED is blinking orange (overload caused by
the total power supplied by the Switching Hub)
When the requested power supply of the Switching Hub exceeds 124 W, causing an overload, you can
check a port that stopped supplying power by changing the mode LED display to that of PoE mode.
Remove the cable from the port with its LED blinking orange to reduce the requested power supply of
the Switching Hub to 124 W or below.
You can set/change the priority of the power supply from the console.
(By factory default, the same priority is given to all Ports 1 to 24.)
* For configuration and management method, please see the PDF version Operating
Instructions in CD-ROM.
Power supply while the overload is caused by a single port
When the requested power supply of a single port exceeds 15.4 W, causing an overload, the power
supply is stopped. You can check a port that stopped supplying power by changing the mode LED
display to that of PoE mode.
Remove the cable from the port with its LED blinking orange.
Caution: 1) Some PoE-powered devices may have a large difference in power consumption between
their maximum power use condition and normal condition. Carefully configure them so
that the upper limit of power supply will not be exceeded.
2) If you don't set a priority for power supply or if the same priority is given, note that the
power supply priority is assigned to the ports in ascending order of the port numbers.
(When the requested power supply exceeds 124 W, power supply to a port with a higher
port number will be stopped first.)
Port LEDs (left) 1 to 24 (with the PoE mode
LED turned on)
Green Light: Supplying power normally.
Orange Blink: Overload caused by a single port.
(Requested power is exceeding
15.4 W.)
Off:
Not supplying power or no
PoE-powered device connected.
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