Dtm Leds - Nortel BCM200 Installation And Maintenance Manual

80 Chapter 3 Viewing the BCM system LEDs
Figure 47 MBM LEDs
Table 20 describes the possible MBM LED states.
Table 20 MBM LED descriptions
Power Status
Off Off
On Off
On Blinking
Blinking Blinking
On On
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.
the DTM LEDs.
N0060612 N0060612
Power Status
Description
The MBM does not have power, or there is a failure of the MBM power
converter.
BCM to expansion unit failure or system initialization.
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)
The MBM has power, but there is a hardware problem such as:
• partial failure of power converter
• thermal overload
• fan failure
The MBM is ready to operate.
Figure 48 shows the location of