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Chapter 4 Troubleshooting Procedures
NortelNetworks 5399 Access Switch HardwareInstallation Guide
Conditions for Replacing a Module
Replacea Remote Access Concentrator with another module of the same
type under any of the following conditions:
If the annunciatoron the module front panel remains off,
indicatingthat the module is not receiving +5 volt power or
thatthe power level is below the reset limit (4.65 volts) when
other modulesin the hub are receivingnormal operating
power.For more information, see Tab le 4-2 .
If the annunciator remains amber,indicating that some
portion of the module hasfailed and a check of the self-test
messages indicatesthat the problem c annot be fixed.For
more information, see Tab le 4-2 .

Module Configuration Management

Each module installedin a Model 5000 chassis operates according to
software parameter valuesand hardware option settings. You can use
these to customize module operationfor that particular hub. This
combination of softwareand hardware values is the module
configuration,of which there are actually two types:
“Primary”configuration, which is the set of base values built
intothe module at the time it is manufactured. A user cannot
change this configuration.
“Default”configuration, which is the permanent
configurationplus any changes to jumper or switch settings.
The defaultconfiguration is valid for any hub slot at any
time. Each modulem ust havea default configuration. This
configurationis stored in two places: on the module itself
and on the supervisorymodule. You can change this
configurationthrough a network management module
(NMM) or through a terminal connectedto the chassis
serviceport.