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Chapter 1: Overview
24
Powered Device
Classes
Powered devices are grouped into the five classes listed in Table 1 on
page 24. The classes are based on the amount of power the devices
require. The switches support all five classes.
Cable
Requirements
The cable requirements for ports operating at 10 or 100Mbps are given in
Table 2.
Table 1. IEEE Powered Device Classes
Class
Maximum Power Output
from a Switch Port
PD Power Range
0 15.4W 0.44W to 12.95W
1 4.0W 0.44W to 3.84W
2 7.0W 3.84W to 6.49W
3 15.4W 6.49W to 12.95W
4 30.0W 12.95W to 25.5W
Table 2. Twisted Pair Cable Requirements for the 10/100Base-TX Ports at 10 or 100Mbps
Cable Type
10Mbps 100Mbps
Non-
PoE
PoE PoE+
Non-
PoE
PoE PoE+
Cat 3: Standard TIA/EIA 568-B-
compliant Category 3 shielded
or unshielded cabling with 100
ohm impedance and a
frequency of 16 MHz.
Yes Yes No Yes Yes No
Cat 5: Standard TIA/EIA 568-A-
compliant Category 5 shielded
or unshielded cabling with 100
ohm impedance and a
frequency of 100 MHz.
Yes Yes No Yes Yes No
Cat 5e: Standard TIA/EIA 568-
B-compliant Enhanced
Category 5 (Cat 5e) shielded or
unshielded cabling with 100
ohm impedance and a
frequency of 100 MHz.
Yes Yes Yes Yes Yes Yes
Cat 6 or 6a: Standard TIA/EIA
568-B-compliant Category 6 or
6a shielded cabling.
Yes Yes Yes Yes Yes Yes