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Chapter 1 Introduction
NortelNetworks 5399 Access Switch HardwareInstallation Guide
Table1-1. Annunciator Conditions
Segment
Connection LEDs TheSegment Connection LEDs indicate which backplane Ethernet LAN
segments arebeing used. There are 12 green LEDs, labeled S1 through
S12, for the 12 Ethernet segments. When an LED is illuminated, it
indicatesthat the Model 5399 Remote Access Concentrator is connected
to the corresponding backplane Ethernet LAN segment; when off it
indicatesthat the corresponding backplane Ethernet LAN segment is not
connected.
ModuleStatus LEDs TheModule Status LEDs are a group of fiveLEDs that display the status
ofthe activity of the Model 5399Remote Access Concentrator. Tabl e 1-2
describes the Module Status LEDs.
Table1-2. Module Status LEDs
Color Operational Condition
Green Themodule is performing normally.
Amber Someportion of the module has failed, or the module is being
initialized.
Off Themodule is not receiving +5 volt power, or the power levelis
belowthe reset limit (4.65 volts).
LED Description
Init Turnsgreen when the Remote Access Concentrator begins the
initializationprocess after a power-upor reset. This is the first
LEDthat lights after power-up or reset. The Init LED turns off
afterthe diagnostics have successfully completed.
Unit Turnsgreen after the Remote Access Concentrator passes the
power-updiagnostics. Turns amber if the power-up diagnostics
fail.
Net Turnsgreen after the Remote Access Concentrator verifiesthat a
validEthernet connection exists.
Attn Turns green when the Remote A ccess Concentrator req uires
operatorattention, that is, in monitor mode. Turnsamber when the
diagnostictests fail.