Maintenance-Object Repair Procedures
555-233-143
8-824 Issue 1 May 2002
d. This alarm is raised when PN maintenance has attempted to execute a
Cold Restart recovery action two times, and both restarts failed. This will
cause the PN to be placed in Emergency Transfer. Examine every
EXP-INTF or ATM-EI error that, when cleared, may aid in resolving this
alarm. Also check for any SNI-BD, SNI-PEER, FIBR-LK, SN-CONF, or
DS1 CONV-BD errors or for ATM, ATM-EI or ATM-NTWK errors that may
indicate a communication problem between the processor and the PN.
Make sure that the physical fiber connectivity matches that of system
administration.
System Technician-Demanded Tests:
Descriptions And Error Codes
EXP-PN does not support demand testing. A demand reset can be executed to
perform a demand reset on an PN by using the reset port-network P level [1 | 2]
command (P is the port network’s number, and 1 or 2 specifies the reset level).
PN Cold Restart (#955)
PN Cold Restart, or PN Reset Level 2, using the command reset port-network P
level 2 is used as a recovery mechanism for an PN that has been taken out of
service. It is executed as a result of PN recovery escalation when a Warm Restart
is not possible, or as a result of a system technician demanded PN restart. Once
an PN has gone out of service, an PN Cold Restart is required to bring it back into
service.
This is the most severe of the PN restarts, and users will experience a service
outage. For the first 30 seconds after the occurrence of an event that requires a
restart, every stable call is preserved (although new calls will be denied). All calls
terminating in the PN are then dropped, and PN users are not able to place new
phone calls during the restart. All PN hardware will also be re-initialized during
this restart. The restart takes no longer than 2 minutes with service being
restored much quicker in a typical restart situation.
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