2Giga Ethernet Managed 4 Band VDSL IP DSLAM USER’S MANUAL Ver. A.4
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Appendix E: Troubleshooting
Diagnosing VDSL Indicators
The VDSL can be easily monitored through its comprehensive panel indicators. These indicators assist the network
manager in identifying problems of the IP DSLAM may encounter. This section describes common problems you may
encounter and possible solutions.
1. Symptom:
POWER indicator does not light up (green) after power on.
Cause:
Defective Power outlet, Power cord, Internal power supply
Solution:
Check the power outlet by plugging in another that is functioning properly. Check the power cord
with another device. If these measures fail to resolve the problem, have the unit power supply
replaced by a qualified distributor.
2. Symptom:
Link indicator does not light up (green) after making a connection.
Cause:
Network interface (ex. a network adapter card on the attached device), network cable, or switch
port is defective.
Solution:
2.1 Power off and re- power on the IP DSLAM.
2.2 Verify that the switch and attached device are powered on.
2.3 Be sure the cable is plugged into both the switch and corresponding device.
2.4 Verify that the proper cable type is used and its length does not exceed specified limits.
2.5 Check the adapter on the attached device and cable connections for possible defects.
2.6 Replace the defective adapter or cable if necessary.
