Nortel Networks BCM50 manual Media bay module LEDs expansion units only, MBM LED descriptions

64Chapter 3 Viewing the BCM50 system LEDs

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

Power Status

Table 13 describes the possible MBM LED states.

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.

The following MBMs have additional LEDs:

•“DTM LEDs” on page 65

•“BRIM LEDs” on page 66

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