MRV Communications MR2228-S2C Benutzerhandbuch
5
Table 1-2. System Status LEDs
LED Condition
Status
On Green
The unit’s internal power supply is operating
normally.
normally.
On Amber
The unit’s internal power supply has failed.
PWR
Off
The unit has no power connected.
On Green
The system diagnostic test has completed
successfully.
successfully.
Flashing
Green
Green
The system diagnostic test is in progress.
Diag
On Amber
The system diagnostic test has detected a fault.
Green
A redundant power unit is attached and is in backup
or active mode.
or active mode.
Amber
There is a fault in the redundant power unit.
RPU
Off
There is no redundant power unit currently
attached.
attached.
Flashing
Amber
Amber
An initial power-on state during which the stack
configuration is detected.
configuration is detected.
Green
This switch is acting as the Master unit in the stack.
Amber
This switch is acting as a Slave unit in the stack.
Stack
Flashing
Green
Green
When the user enters the light unit command in
the CLI, the unit ID of each switch in the stack will
be displayed by the port LEDs 1 to 8.
the CLI, the unit ID of each switch in the stack will
be displayed by the port LEDs 1 to 8.
Power Supply Receptacles
There are two power receptacles on the rear panel of the switch. The standard