D-Link DGS-3000 Reference Manual page 350

DGS-3000 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
Parameters
None.
Restrictions
None.
Example
To display the real-time status of external alarm:
DGS-3000-26TC:admin#show external_alarm
Command: show external_alarm
Channel Status
----------- ---------
1 Normal
2 Normal
CTRL+C ESC q Quit SPACE n
Alarm Message
-----------------------------------------------------
External Alamr: UPS is Exhausted.
External Alarm 2
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