Nortel BCM50 Troubleshooting Manual page 23

The table BRI port LED indicators
Table 6 BRI port LED indicators
LED (channel) Status
D On (green)
B1 On (green)
B2 On (green)
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
LEDs on an MBM. The power and status LEDs are in the same location on all MBMs.
Figure 6 MBM LEDs
Power
The table MBM LED descriptions
Table 7 MBM LED descriptions
Power Status
Off Off
On Off
On Blinking
Blinking Blinking
On On
on page 23 describes the possible BRI port LED states.
Description
D channel is functioning through this BRI port.
B channel 1 is functioning through this BRI port.
B channel 2 is functioning through this BRI port.
on page 23 shows the location of the
Status
on page 23 describes the possible MBM LED states.
Description
The MBM has no power, or a failure occurred on the MBM power converter.
BCM50 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.
Chapter 3 Hardware Troubleshooting
(Power)
BCM50 Troubleshooting Guide
23
and
(Status)