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Maximum cable
20 Ω (Category
resistance per
3)
pairset
Three power
class leve s (1-
Power management
3 negotiated
by signature
Derating of
maximum cable
None
ambient operating
temperature
Category 3 and
Supported cabling
Category 5
Mode A
Supported modes
(endspan), Mode
B (midspan)
Power Devices
Classification current
Class Usage
0
Default 0 - 4
1
Optional 9 - 12
2
Optional 17 - 20
3
Optional 26 - 30
4
Reserved 36 - 44
For IEEE 802.3at (type 2) devices class 4 instead of Reserved has a power range of 12.95 - 25.5
W.
PoE Specification
1. The port 1 ~ 4 supports the PoE function.
2. Total-power: The maximum power which the switch can support to the PDs.
Notice: You must reserve about 20 W for the system. That is, if you connect an
external power supported 240W. The total power should be 220W only.
3. Schedule: The Switch allows user to arrange a week schedule to enable or disable the
PoE for the specific ports.
Perpetual POE
The Perpetual POE provides uninterrupted power to connected powered device (PD) even
when the power sourcing equipment (PSE) switch is booting.
12.5
Ω (Cat gory
5)
Four power
class level (1-
4) negotiated
by signature
or 0.1
W steps
negotiated by
LLDP
5 °C (9 °F)
with one
mode (two
pairs) active
Category 5
Mode A,
mode B
Power Levels Available
Power range
[mA]
[Watt]
0.44 - 12.94 Classification unimplemented
0.44 - 3.84
3.84 - 6.49
6.49 - 12.95 Mid power
12.95 - 25.50 High power
168
12.5 Ω
12.5 Ω
Eight power
Six power class
class levels (1-
levels (1-6)
8) negotiated
negotiated by
by signature
ignature or 0.1
or 0.1 W steps
W steps negotiated
negotiated by
by LLDP
LLDP
10 °C (20 °F)
10 °C (20 °F) with
with
more than half of
temperature
bundled cables
planning
pairs at Imax
required
Category 5
Category 5
Mode A, mode B,
4-pair mode
4-pair mode
Class description
Very Low power
Low power
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