Programming instructions

199
Troubleshooting
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 19: In-Line Power Troubleshooting (continued)
Symptoms Probable cause Corrective Action
(Page 3 of 4)