Installation guide

1-5
Chapter 1 Introduction
Nortel Networks 5399 Access Switch Hardware Installation Guide
Within a segment bank, the specific segment to which a Model 5399
Remote Access Concentrator module is connected is determined by
setting the segment selection DIP switch on the module. For more
information, see “Setting the Backplane Ethernet Segment” on page 2-3
.
System 5000 Service Port Management
The service port, located on the front panel of the chassis, provides a
switched serial communication link between the service port and any
module in the hub, including the supervisory module. By connecting a
terminal to this port, you can change the configuration parameter values
for the Remote Access Concentrator installed in the hub.
For more information, see “
Connecting a Service Port Terminal”onpage
2-14, “Remote Access Concentrator Parameters” on page 2-18,and
“Installing the Model 5399 Remote Access Concentrator” on page 2-3
.
Firmware and Software
Firmware
The Model 5399 Remote Access Concentrator’s ROM containsfirmware
for performing power-up self-tests and loading operational code. A
non-volatile EEPROM stores the configuration parameters.
The Remote Access Concentrator can boot from the boot image in its
Flash memory or can boot an image received from a boot server on the
network.
ROM Monitor
The ROM monitor is an interactive command interpreter that is used to
define basic configuration parameter values. All of the information that
theModel5399RemoteAccessConcentratorneedstobootanoperational
image is defined using the ROM monitor and its command set. ROM
Monitor commands are issued from a terminal connected to the service
portonthehub chassis.WhentheRemoteAccessConcentratorcompletes
its self tests, the service port terminal displays the ROM monitor prompt.
Using the ROM Monitor commands (see Chapter 3
), you can: