Nortel BCM50, Installation And Maintenance Manual

Page: 64 / 246

64 Chapter 3 Viewing the BCM50 system LEDs
N0027152 01 N0027152 01
Media bay module LEDs (expansion units only)
The two media bay module (MBM) LEDs on a expansion unit show the power and status of the
MBM.
Figure 24 shows the location of the
(Power)
and
(Status)
LEDs on an MBM. The
power and status LEDs are located in the same place on all MBMs.
Figure 24 MBM LEDs
Table 13 describes the possible MBM LED states.
The following MBMs have additional LEDs:
• “DTM LEDs” on page 65
• “BRIM LEDs” on page 66
Table 13 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 BCM50 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