
4-1
Nortel Networks 5399 Access Switch Hardware Installation Guide
Chapter 4
Troubleshooting Procedures
T
his chapter describes front panel alarms and LED indicators,
power-up and booting, troubleshooting during booting, and the file
created from a Remote Access Concentrator dump.
Front Panel Alarms and LED Indicators
The Model 5399’s front panel contains a number of LEDs that provide
information about normal operations and about problems that occur. Use
these LEDs and the ROM Monitor commands to diagnose problems.
Figure 4-1
illustrates the Model 5399’s front panel LEDs.
Figure 4-1. Model 5399 Front Panel Alarms and LEDs
Annunciator
Segment
Connection
LEDs
WAN 1 Port
WAN 2 Port
Module Status
LEDs
Network Status,
Alarm, and
Port Usage LEDs
WAN 1
WAN 2
WAN 1
WAN 2