Troubleshooting
Release 3.3 243
This section provides a symptom and resolution sequence in order to assist in troubleshooting
minor operating problems.
If you encounter problems
• Ensure power is applied to the 3300 In-Line Power Unit
• Ensure a “crossover” type Ethernet cable is not used
• Ensure input Ethernet cable is connected to the Data In port
• Ensure output Ethernet cable is connected to the Data & Power Out port
• Ensure input and output cable pairs are attached to corresponding ports.
Green – On
Orange – Off
Active load is plugged in and complies
to normal load conditions
Continuous nominal DC voltage is
present on the spare pairs.
Green – Off
Orange – On
Overload conditions or shorted
terminal port or forced external voltage
feed (constant DC) into the port
Power to the port is disconnected.
No DC voltage is present on the
spare pairs.
Green – On
Orange – On
Internal Hardware Fault No DC voltage is present over the
wires
Green – Blinking
Orange – Off
Transitional mode in which Load
detection is in process or discharged
capacitor in the PDTE
Power is disconnected.
No DC voltage is present over the
wires
Green – Off
Orange – Blinking
Total aggregate power exceeds
pre-defined power budget
Power is disconnected the blinking
port.
Main Power Status Indications - AC LED (Green)
AC LED State Main Power Status Meaning
Off Main internal power supply unit is
unplugged or faulty
Main voltage is under 12v
On Main power supply unit is plugged &
under normal operating conditions
Main voltage is 42v to 57v
Green Blinking
(Port’s Green LED on)
Main power supply unit voltage
exceeds specified limits
Main voltage is 38v to 42v or
57v to 59v Port’s power
enabled
Green Blinking
(Port’s Green LED off)
Main power supply unit voltage
exceeds specified limits
Main voltage is under 38v or
above 57v Port’s power
disabled
Unit Status Indications - Alarm LED (Orange)
Alarm LED State Meaning
Off Built-in Self Test passed
On Built-in Self Test failed
Blinking S/W load failure. Reinstall S/W.