Troubleshooting guide

Hardware
65
IP device that receives PoE
from a CXi controller port is not
powering up.
Maximum PoE has been
exceeded. The CXi controller
provides a maximum 100
Watts for PoE.
Refer to the Engineering Guidelines for
information on how to engineer PoE for the
system.
Power over Ethernet has been
disabled for the IP device port
In the System Administration Tool check the
Layer 2 (L2) Switch form. Ensure that the
Power over Ethernet is set to “Auto” for the
port.
IP device works, but there is no
data link.
Wiring problem
OR
Faulty IP device OR
Faulty Power Unit. OR
Missing/faulty local power
adapter.
1. Verify that the port’s Power Active LED is
continuously ON.
2. Verify that the connections for the port pair
both correspond to the same IP device, and
that the port connections are not reversed.
3. The IP device may require a local power
adapter to operate. If an adapter is already
in use, replace it with a known working
adapter. If this works, replace the faulty
adapter.
4. Verify you are using a standard UTP
Category 5, 6 or 6e cable (with 8 wires–4
pairs).
5. Verify that the cable length between the
Power Unit and the IP device does not
exceed 100 metres.
6. Verify that you are not using any crossover
cables.
7. Verify that the Power Unit is connected to a
switch/hub with a good RJ-45 patch cord
connection.
8. Connect the IP device directly to the Power
Unit using a short cable. If the device works
normally, the original cable (or one of its
connectors) is faulty.
9. Try to connect a known working IP device to
the same port (test device). If the test
device works and the link is established,
there is probably a faulty data link in the
original IP device.
10.Connect the IP device to a different port
pair. If the device works, one of the original
ports is probably faulty, or there is a bad
RJ-45 connection.
Table 17: IP Phone Power Troubleshooting
Symptom Probable Cause Corrective Action
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