3com DSA-3CV1001-02 Manuel D’Utilisation

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ROUBLESHOOTING
This appendix explains how to identify and correct problems, and how to 
perform related diagnostic tasks.
If you have problems that are not addressed in this chapter, contact 
3Com Technical Support or your service person. Refer to 
 for 
technical support information.
Power-on Self Test 
(POST)
When the VCN Access Point is plugged-in, the VCN AP immediately starts 
the power-on self test (POST) sequence as indicated by the power LED 
flashing in green. If the VCN AP is not powered, the power LED remains 
OFF. Check the power connections and the ac/dc adapter.
The power-on self test verifies that every component of the VCN AP is 
fully functional. The power-on self test lasts for 30 seconds at the most, 
during which time it is orange. If the power-on self test is successfully 
completed, the power
 
LED turns green. If the power-on self test detected 
a VCN AP failure, the power LED remains orange. In this case, contact 
3Com technical support; refer to 
Use the front panel LEDs to determine each port’s status:
Table 7   Determining VCN AP Status During POST
State
Ethernet
Line
Power
Notes
Off
-
-
Off
VCN AP is not connected to a 
power source or failed.
Power-on
-
-
Orange Test is in progress
Power-on
-
-
Off
VCN AP failed