Dtm Leds - Nortel BM450 Troubleshooting Manual

22 Chapter 3 Hardware Troubleshooting
Figure 2 MBM LEDs
The table MBM LED descriptions
Table 3 MBM LED descriptions
Power Status
Off Off
On Off
On Blinking
Blinking Blinking
On On

DTM LEDs

The DTM has additional LEDs that are not on most other MBMs. The figure
23 shows the location of the DTM LEDs.
NN40160-700 NN40160-700
Power Status
on page 22 describes the possible MBM LED states.
Description
The MBM has no power, or a failure occurred on the MBM power converter.
BCM450 to expansion unit failure or system initialization.
Hardware is working, but an operational problem exists such as:
• no link to the 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 a hardware problem exists such as:
• partial failure of power converter
• thermal overload
• fan failure
The MBM is ready to operate.
DTM LEDs on page