User Guide

Device
Class
Standard
Range of Power
Delivered to the
Powered Device
Minimum Output at
PoE Switch Port
(Minimum Allocated)
Maximum Output at
PoE Switch Port
(Maximum Allocated)
0
PoE/PoE+
0.44W-12.95W
15.4W
16.2W
1
PoE/PoE+
0.44W-3.84W
4.0W
4.2W
2
PoE/PoE+
3.84W-6.49W
7.0W
7.4W
3
PoE/PoE+
6.49W-12.95W
15.4W
16.2W
4
PoE+
12.95W-25.5W
30.0W
31.6W
If for example, you have 10 PDs that are class 2, the total budget required is 70W.
Alternative Power Source
Where possible, check if the PD works with another PoE switch, or, where applicable check if
the PD powers on using an external power supply. If the PD does not power on from any of these
power sources, then the problem is likely with the PD.
Cabling
Check that the Ethernet cabling you are using is of good quality. It should be CAT5e or better.
To be certain, try testing with different cabling to that currently in use.
Port Configuration
In the admin page of the switch, ensure that the port connected to the PD is not administratively
disabled. Also, check that the PoE configuration of the port is valid (i.e. that PoE is enabled for
the port, and, set to the right standard and power limit, where applicable). For further
information, refer to the user manual for your switch.
Note: This does not apply to unmanaged switches and certain Web Managed Plus switches.
Firmware Update
It is possible that specific PoE-related problems may have been addressed in a firmware release.
Refer to the product support page for your switch to download the latest firmware and update it.
For further information, refer to the user manual for your switch and firmware release notes.
Note: This does not apply to unmanaged switches.
Reset Configuration
It is possible that a mis-configuration of the switch may cause problems. Reset the switch to
factory default settings. This will erase the current configuration so you should, where necessary,