User's Manual

80 Chapter 3 Viewing the BCM system LEDs
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Figure 46 MBM LEDs
Table 20 describes the possible MBM LED states.
The following MBMs have additional LEDs:
• “DTM LEDs” on page 80
• “BRIM LEDs” on page 82
DTM LEDs
The DTM has additional LEDs that are not on most other MBMs. Figure 47 shows the location of
the DTM LEDs.
Table 20 MBM LED descriptions
Power Status Description
Off Off The MBM does not have power, or there is a failure of the MBM power
converter.
On Off BCM to expansion unit failure or system initialization.
On Blinking Hardware is working, but there is an operational problem such as:
• no link to main unit is detected
• frame alignment is lost on messages from the main unit
• bandwidth not allocated
• MBM is in maintenance state
• MBM is in download state (GASM, GATM4/GATM8)
Blinking Blinking The MBM has power, but there is a hardware problem such as:
• partial failure of power converter
• thermal overload
• fan failure
On On The MBM is ready to operate.
Power Status