Ericsson RBS 2106 Hardware Reference Manual page 287

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Off
Red,
On
Fault
Flashing
Off
Green,
Operational
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No fault is localised in the unit
One or more faults are localised in the unit
The unit has detected lost communication to a
superior unit.
The unit is not operational
The unit is operational
7(8)
EN/LZT 720 0237 R1A