10 www.trend-networks.com 158835 Rev 1.
UNDERSTANDING THE RESULTS
Volts
Voltage displayed on the results screen
is the “loaded” voltage. It is the voltage
measured when the PoE PRO applies a
load to the cable, simulating a PoE device
(PD).
This voltage may be lower than the
unloaded voltage displayed when initially
connected.
Watts
Maximum available power is displayed
in watts (W). This is the most power the
PoE PRO is able to demand from the PoE
supply during the test.
Type (af / at / bt /-)
Displays the IEEE 802.3 standard to which
the connected PSE is compatible.
af = IEEE 802.3af
at = IEEE 802.3at
bt = IEEE 802.3bt
Class (0 – 8 or “-“ )
Displays the advertised Class of the
Power Sourcing Equipment (PSE). The
class determines the maximum amount of
power the PSE can supply.
The PoE PRO will adjust its internal load
and attempt to pull the maximum power
the advertised Class supports. The chart
below cross-references Class to supported
power.
A “-” will be displayed when the PSE does
not support 802.3af/at/bt negotiation.
This is typical of passive mid-span
injectors that apply voltage to the line
regardless of the connected network
device.
Pass / Fail Indication
The test will pass ( ) if the power available
during the PoE load test is equal to, or
greater than the MINIMUM power for
PSE Class.
Example: If class 4 is detected the test will
PASS if 25.5 W or more watts is delivered.
If less than 25.5 W watts is delivered the
test will FAIL.
Class Minimum and Maximum Power
for each Class
0 (—) 12.9 - 15.4 W
13.8 - 4.0 W
26.5 - 7.0 W
312.9 - 15.4 W
425.5 - 30.0 W
540 - 45 W
651 - 60 W
762 - 75 W
873 - 90 W
