Nortel Networks 400 4.0 User Manual

Chapter 19 System monitoring and troubleshooting

BCM200/400 4.0 Installation and Maintenance Guide

Figure 100   LED locations on the face of the base function tray

The BCM MBMs are working when both the Power and Status LEDs on the modules are on and 
are not blinking.

•

If the Power LED does not light, refer to 

the BCM system is correctly shut down, remove the module and check the connectors at the 
back of the module for dust or loose connections. 

After you reinstall the module, if the LED still does not light, install a different module into 
that bay to check for a possible fault in the backplane. If the second module works, assume 
that the first module is defective and replace it with a new module.

•

If the Power LED lights, but the Status light does not light, or continues to blink, wait 10 
minutes to allow for information download. If the light continues to blink, power down the 
system and check the DIP switch settings on the module. Ensure the connector is clean and 
free from debris.

•

If the LEDs are on solid, but the module cannot communicate or be communicated with, check 
the Element Manager settings for the module and the DIP switch settings on the back of the 
module.

Note: The system status LEDs correspond to the devices, not to the PCI slots. 

Note:  LEDs 3 - 8 (inclusive) do not blink if there is a failure in the monitoring software.

BCM400

Power

Status

Disk

Temp

Reset

Fan

MSC

WAN

Modem

LAN 1

LAN 2

Red

Green Flash or Off

Off

Red

Trouble 
indication

Component