Nortel Circuit Card Installation Manual page 416

Page 416 of 906
Maintaining the MSDL
System controlled maintenance
553-3001-211 Standard 3.00
NT6D80 MSDL card
• Recovery Threshold The MSDL card was successfully enabled by the
MSDL autorecovery function five times within 30 minutes. Each time it
was system disabled because of a problem encountered during operation.
• Bootloading The MSDL base software is in the process of being
downloaded to the MSDL.
Detailed information on system disabled substates and the action required for
each substate appears in "Symptoms and actions" on
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.
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: Administration
(553-3001-311). Detailed information of system disabled substates and the
action required for each substate is found at the end of this document.
August 2005
page 422.