Axis Communications T8123, T8126, T8128 manual Troubleshooting, Symptom Corrective steps

Page 8 High PoE Midspan and Splitters Installation Guide

Troubleshooting

Symptom	Corrective steps
Midspan does not power up	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.
A port indicator is not lit and the PD	1.	The Midspan did not detect a PD; and the port is not enabled.
(powered device) does not operate	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 an external PoE device is connected, 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.
The end device operates, but there is	1.	Verify that the port indicator on the front panel is continuously
no data link		lit.
	2.	If an external PoE device is in use, replace it with a known good
		PoE device.
	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 (333
		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.