Dtm Leds - Nortel Business Communications Manager 450 Installation Manual

Figure 23 Media bay module LEDs (expansion cabinets only)
The power and status LEDs are in the same location on all MBMs. For
information about the possible MBM LED states, see
module LEDs (expansion cabinets only) (page
Table 9 Media bay module LEDs (expansion cabinets only)
Power
Off
On
On
Blinking

DTM LEDs

The DTM has additional LEDs that are not on most other MBMs. For
information about the location of the DTM LEDs, see
(page
Copyright © 2006-2009 Nortel Networks
Power Status
Status
Off
Off
Blinking
Blinking
120).
Nortel Business Communications Manager 450 1.0
Installation — System
NN40160-301 01.04 Standard
July 2009
LED indicators reference 119
Table 9 Media bay
119).
Description
The MBM has no power, or a failure
occurred on the MBM power converter.
MBM 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
Figure 24 DTM LEDs