Recovery
Issue 5 October 2002
47
555-233-119
Recovery
When the system is initially powered up, or when an existing system experiences
a catastrophic fault that interrupts its basic functions, the system either initializes
or reboots.
There are several less severe resets available to the system that allow it to
recover from disrupting errors. The user can initiate these resets by using reset
system n commands, where n is the reset level. These commands restart the
system at various levels, depending on the required test activity. The reset system
commands are discussed below.
A system is reset due to a loss of power, or through:
■
Reset commands at the administration terminal.
■
Maintenance software, from which the system can reset itself. This process
starts when certain software and hardware errors are detected by the
software.
!
WARNING:
When the system is rebooted or reset at level 2, 3, 4, or 5, all voice
terminal and attendant console features are adversely affected.
Users should be advised of services that are lost and that, as a result,
must be reactivated. See
‘‘Removing Power’’ on page 66
.
The administration terminal display and circuit pack LEDs indicate the progress of
the recovery process. See
‘‘LED Interpretation’’ on page 110
for more information.
The sections that follow discuss successful system resets. For each level of reset,
a typical administration terminal display is provided. Note that any hexadecimal
numbers shown in parentheses, such as
(=8B89)
, are only examples and are
subject to change.
NOTE:
If any of the diagnostic tests fail, the system may or may not function
properly, and the LMM may or may not proceed with the restart. If the LMM
does not proceed with the restart, the system goes into SPE-Down Mode. In
failure cases, the appropriate part (for example, the Processor circuit pack)
should be replaced. You must obtain a new license file any time you replace
the processor circuit pack.
NOTE:
Use and check the results of the set/get vector commands found in
Chapter 2, ‘‘Maintenance Commands’’
, to determine how much time should
be added for the recovery levels. Also, if an update file is applied on a
system reset, add from 30 seconds to one minute to the recovery time for
that reset.