Nortel Networks BCM200/400 - Manual (Page 82)

82 Chapter 3 Viewing the BCM system LEDs
N0060612 N0060612
Figure 47 MBM LEDs
Table 20 describes the possible MBM LED states.
The following MBMs have additional LEDs:
• “DTM LEDs” on page 82
• “BRIM LEDs” on page 84
DTM LEDs
The DTM has additional LEDs that are not on most other MBMs. Figure 48 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