Troubleshooting - Axis T8121 Installation Manual

Page 6

Troubleshooting

Symptom
Midspan does not power up
A port indicator is not lit and the PD
(powered device) does not operate
The end device operates, but there is
no data link
High PoE Midspan and Splitters Installation Guide
Corrective steps
1. Verify that an approved power cable is used.
2. Verify that the voltage at the power inlet is between 100 and
240V AC.
3. Remove and re-apply power to the device and check the
indicators during power up sequence.
1. The Midspan did not detect a PD; and the port is not enabled.
2. Verify that the PD is designed for PoE operation.
3. Verify that you are using a standard Category 5/5e/6, straight-
wired cable, with four pairs.
4. If there is a connected external power splitter, replace it to verify
that it is functioning properly.
5. Ensure that the input Ethernet cable is connected to the Data In
port.
6. Verify that the PD is connected to the Data & Power port.
7. Try to reconnect the same PD into a different Midspan. If it works,
there is probably a faulty port or RJ-45 connection.
8. Verify that there is no shortcut over any of the twisted pair cables
or over the RJ45 connectors.
1. Verify that the port indicator on the front panel is continuously
lit.
2. If an external power splitter is in use, replace it with a known
good splitter.
3. Verify that for this link, you are using standard UTP/FTP Category
5 straight (non-crossover) cabling, with all four pairs.
4. Verify that the Ethernet cable length is less than 100 meters (33
feet) from the Ethernet source to the powered device.
5. Try to reconnect the same PD into a different Midspan. If it works,
there is probably a faulty port or RJ-45 connection.