Appendix C: Troubleshooting - netsys NH-300SP User Manual

Appendix C:
Troubleshooting
Diagnosing the Modem's Indicators
The Modem can be easily monitored through its comprehensive panel indicators. These indicators assist the network
manager in identifying problems the hub 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 External power supply
Check the power plug by plugging in another that is functioning properly. Check the power cord
Solution: 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.
Network interface (ex. a network adapter card on the attached device), network cable, or switch
Cause:
port is defective.
2.1
2.2 Be sure the cable is plugged into both the switch and corresponding device.
2.3 Verify that the proper cable type is used and its length does not exceed specified limits.
Solution:
2.4 Check the Modem on the attached device and cable connections for possible defects.
2.5 Replace the defective Modem or cable if necessary.
2.6 Check CO side must support long driver TYPE.
NH-300SP 2Ethernet HPNA Modem USER'S MANUAL Ver. A.7
Verify that the switch and attached device are powered on.
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