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