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LED | State | Indication
-----------|--------------|---------------------------------------
Status | Green On | System OK
|------------------------------------------------------
| Yellow On | Self-test failed (non-fatal error),
| | module should still be operational.
|------------------------------------------------------
| Yellow blink | Self-test failed (fatal error),
| | module may not be operational.
-----------|--------------|---------------------------------------
Beacon | Yellow On | RI/RO ring is beaconing
|------------------------------------------------------
| Off | RI/RO is not beaconing.
-----------|--------------|---------------------------------------
Isolate | Green On | Module is isolated from the hub.
|------------------------------------------------------
| Off | Module is connected to the hub ring.
-----------|--------------|---------------------------------------
Backup | Green On | RI/RO trunks are using the backup path
|------------------------------------------------------
| Off | RI/RO trunks are not using the backup
| | path. The trunks are using the primary
| | path or the backup path is unavailable.
-----------|--------------|---------------------------------------
Speed | Green On | Indicates current speed.
(16 or 4) | |
-----------|--------------|---------------------------------------
RI and RO | Green On | RI or RO enabled, connection currently
| | established.
|------------------------------------------------------
| Green blink | No signal detected from remote device.
|------------------------------------------------------
| Yellow blink | Signal detected from remote device,
| | but RI or RO connection not currently
| | established, possible due to:
| | ° initial wrap delay (temporary state
| | lasting about 30 seconds)
| | ° incorrect compatibility mode
| | ° Beaconing condition
| | ° Ring speed mismatch.
|------------------------------------------------------
| Off | RI or RO disabled by user.
-----------|--------------|---------------------------------------
Lobe | Green On | Port enabled and attached station is
| | inserted in ring.
|------------------------------------------------------
| Green blink | Port enabled but attached station not
| | inserted (phantom not detected).
|------------------------------------------------------
| Yellow On | Port automatically disabled due to
| | security breach.
|------------------------------------------------------
| Yellow blink | Port automatically disabled due to
| | beaconing condition or incorrect device
| | ring speed.
|------------------------------------------------------
| Off | Port disabled by user.
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Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.