Avaya Definity SI, Руководство по обслуживанию, Страница: 1875 / 2968

MEM-BD (Memory)
Issue 4 May 2002 10-1089 555-233-123
MEM-BD (Memory)
NOTE:
For memory problems on systems with a TN2404/TN790 RISC processor
circuit pack, see “PR-MEM.”
Notes:
a. Non-TN2404/TN790 is on the processor circuit pack and not on a separate
memory circuit pack. The maintenance object is “MEMORY” and not
“MEM-BD.” However, all references to MEM-BD in this section are
applicable to “MEMORY” as well.
The Memory contains the DEFINITY software and firmware. The
Processor circuit pack is the most critical component of all system
operations.
b. Non-TN2404/TN790 systems contain memory that is integrated with the
processor. For testing purposes, the circuit pack is logically separated into
PR-MAINT, PROCR, and MEMORY. This means that a memory problem
on 386 systems requires that the Processor be replaced. 386 systems
contain two types of memory: Flash ROM and DRAM. Flash ROM is
permanent memory that contains the boot image, PI firmware, and
PACCON firmware. This type of memory is not erased during circuit pack
resets. It can be reprogrammed only via upgrade software. DRAM is used
for software data storage, and it changes constantly. DRAM loses its value
during circuit pack resets. Both types of memory are present on the
Processor circuit pack. The diagnostics run appropriate tests on both
memories.
For all system activity, the Processor must be able to access the Memory. If
the Processor cannot do this, the system goes into SPE-down mode. In
SPE-down mode, fatal Memory errors may show up as Processor errors.
This merely indicates that the Processor and the Memory are very closely
linked as a matter of course.
If the initialization diagnostics fail, refer to the “Procedure for SPE-Down
Mode” section in
Chapter 4, ‘‘Initialization and Recovery’’ .
Memory faults usually indict the Processor circuit pack (TN2404/TN790) or
the CPP1 circuit pack, however the problem may be on the TN786B.
MO Name (in
Alarm Log)
Alarm
Level Initial Command to Run Full Name of MO
MEM-BD MAJOR test memory l c Memory
MEM-BD (a) WARNING test memory sh c Memory
MEMORY (b) MAJOR test memory a/b sh c Memory