Nortel Networks 1000 - Manual (Page 405)

Maintenance 405
Maintaining the MSDL
The system controls automatic MSDL maintenance functions. A
craftsperson or system administrator performs manual maintenance
by changing the card status, downloading new versions of peripheral
software, or invoking self-tests.
System controlled maintenance
Built-in diagnostic functions constantly monitor and analyze the system
and individual card, performing the following operations:
• using autorecovery to automatically correct a temporarily faulty
condition and maintain the system and its components
• printing information and error messages to indicate abnormal
conditions that caused a temporary or an unrecoverable error
During system initialization, the system examines the MSDL base code. If
the base code needs to be downloaded, the CPU resets the MSDL card
and starts downloading immediately following initialization. At the same
time, all other MSDL peripheral software programs are checked and, if
they do not correspond to the system disk versions, the correct ones are
downloaded to the card.
If manual intervention is required during initialization or operation,
information and error messages appear on the console or the system
TTY to suggest the appropriate action. For a complete discussion of the
information and error messages, refer to Software Input/Output Reference
— Administration (NN43001-611). Detailed information of system disabled
substates and the action required for each substate is found at the end
of this document.
Manually controlled maintenance
Use manual maintenance commands found in the following programs to
enable, disable, reset, get the status of, and perform self-tests on the
MSDL card:
• Input/Output Diagnostic Program LD 37
• Program LD 42
•
Link Diagnostic Program LD 48
•
PRI D-channel Diagnostic Program LD 96
For a complete discussion of these programs, refer to Software
Input/Output Reference — Administration (NN43001-611).
Note 1: Enter commands after the dot (.) prompt.
Note 2: The " x " in the commands below represents the DNUM value
of the card number.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.