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Troubleshooting
Tsunami
®
 800 & 8000 Series - Software Management Guide 
268
8.1 PoE Injector
Problem
Solution
The Device Does Not 
Work
Make sure that you are using a standard UTP
– Category 5e/6 cable in case of MP-8100-SUA, MP-8150-SUR, 
MP-8150-SUR-100, MP-8200-BSU-G, MP-8250-BS9-G, MP-8250-BS1-G, 
MP-8200-BSU, MP-8250-BS9, MP-8250-BS1, MP-820-BSU-100, 
MP-822-BSU-100, MP-825-BS3-100, MP-8200-SUA, MP-820-SUA-50
+
MP-820-SUA-100, MP-822-SUA-100, MP-825-SUR-50
+
, MP-825-SUR-100, 
QB-8200-LNK-G, QB-8200-LNK, QB-825-EPR/LNK-50
+
, QB-825-EPR/LNK-100, 
QB-835-EPR/LNK-25
 
and QB-835-EPR/LNK-50
 
devices
– Category 5/5e cable in case of MP-835-CPE-10MP-835-CPE-10
MP-835-CPE-25MP-835-CPE-50MP-835-CPE-100,MP-825-CPE-50, 
MP-825-CPE-100 and QB-826-EPR/LNK-100. 
Try a different port on the same PoE Injector hub (remember to move the input port 
accordingly) – if it works then there is a problem in the previous RJ45 port or a bad 
RJ45 port connection.
Try to connect the device to a different PoE Injector hub.
Try using a different Ethernet cable – if it works, there is probably a fault in the cable 
or its connection.
Check the power plug and hub.
If the Ethernet link goes down, check the cable, cable type, switch and hub.
There is No Data Link 
Verify that the indicator on the device port is “ON.”
Verify that the Ethernet cable from PoE Injector hub to the Ethernet port of the 
device is properly connected.
Make sure that you are using a standard UTP
– Category 5e/6 cable in case of MP-8100-SUA, MP-8150-SUR, 
MP-8150-SUR-100, MP-8200-BSU-G, MP-8250-BS9-G, MP-8250-BS1-G, 
MP-8200-BSU, MP-8250-BS9, MP-8250-BS1, MP-820-BSU-100, 
MP-822-BSU-100, MP-825-BS3-100, MP-8200-SUA, MP-820-SUA-50
+
MP-820-SUA-100, MP-822-SUA-100, MP-825-SUR-50
+
, MP-825-SUR-100, 
QB-8200-LNK-G, QB-8200-LNK, QB-825-EPR/LNK-50
+
, QB-825-EPR/LNK-100, 
QB-835-EPR/LNK-25
 
and QB-835-EPR/LNK-50
 
devices
– Category 5/5e cable in case of MP-835-CPE-10MP-835-CPE-25
MP-835-CPE-50MP-835-CPE-100, MP-825-CPE-50, MP-825-CPE-100 and 
QB-826-EPR/LNK-100. The length of the cable from the Ethernet port of the 
device to the PoE should be less than 100 meters (approximately 325 feet).
Try to connect a different device to the same port on the PoE Injector hub – if it 
works and a link is established then there is probably a fault in the data link of the 
device.
Try to re-connect the cable to a different output port (remember to move the input 
port accordingly) – if it works then there is a fault probably in the output or input 
port of the PoE Injector hub or a bad RJ45 connection.
Overload Indications
Connect the device to a PoE Injector.
Ensure that there is no short over on any of the connected cables.
Move the device into a different output port (remember to move the input port 
accordingly) - if it works then there is a fault probably in the previous RJ45 port or 
bad RJ45 port connection.