AT-x230-10GT, AT-x230-10GP, AT-x230-18GT, AT-x230-18GP, AT-x230-28GT and AT-x230-28GP Switch Installation Guide
29
Powered device
classes
Powered devices are grouped into the five classes listed in Table 2 on
page 29. The classes are based on the amount of power the devices
require. The x230 Series PoE switches support all five classes.
Cable
requirements
Cable requirements for ports operating at 10 or 100Mbps are in Table 3.
Cable requirements for ports operating at 1000Mbps are in Table 4.
T
ABLE 2. IEEE POWERED DEVICE CLASSES
Class
Maximum power output
from a switch port
PD power range Margin of cable loss
0 15.4W 0.44W to 12.95W 0.8W
1 4.0W 0.44W to 3.84W 0.2W
2 7.0W 3.84W to 6.49W 0.4W
3 15.4W 6.49W to 12.95W 0.8W
4 30.0W 12.95W to 25.5W 1.2W
TABLE 3. TWISTED PAIR CABLE REQUIREMENTS FOR THE 10BASE-T AND 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
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