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Chapter 3 Hardware Troubleshooting 23

BCM50 Troubleshooting Guide

The table BRI port LED indicators on page 23 describes the possible BRI port LED states.

Media bay module LEDs (expansion units only)

The two media bay module (MBM) LEDs on an expansion unit show the power and status of the

MBM. The figure MBM LEDs on page 23 shows the location of the

(Power) and (Status)

LEDs on an MBM. The power and status LEDs are in the same location on all MBMs.

Figure 6 MBM LEDs

The table MBM LED descriptions on page 23 describes the possible MBM LED states.

Table 6 BRI port LED indicators

LED (channel) Status Description

D On (green) D channel is functioning through this BRI port.

B1 On (green) B channel 1 is functioning through this BRI port.

B2 On (green) B channel 2 is functioning through this BRI port.

Table 7 MBM LED descriptions

Power Status Description

Off Off The MBM has no power, or a failure occurred on the MBM power converter.

On Off BCM50 to expansion unit failure or system initialization.

On Blinking 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)

Blinking Blinking The MBM has power, but a hardware problem exists such as:

• partial failure of power converter

• thermal overload

• fan failure

On On The MBM is ready to operate.

Power Status

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