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8-5
D-620003-0-20 Rev J
CONFIDENTIAL
Replacing a Main Hub
Checking the Main Hub’s LEDs
• The LEDs should blink through a 5-second test on power up.
• If the LEDs do not blink on power up, replace the Main Hub.
• If the LEDs do not illuminate at all, make sure the AC power cable is con-
nected.
• For each fiber optic port that has a connected Expansion Hub, which has been pro-
grammed with a band:
• The
LINK
LED should be green.
• The
E-HUB/RAU
LED should be green indicating that all downstream units are
functioning
• Refer to Section 9.3, “Troubleshooting,” on page 9-3 for more LED states.
NOTE:
If there is communication between the Main Hub and the Expansion Hubs,
use the AdminManager to isolate system problems.