NEC SV8500 Operation And Maintenance Manual - page 77
of
975
– 30 –
CHAPTER 1
General
Figure 1-12 Block Diagram of Fault Detection (1-IMG)
SYMBOL
MEANING
SYMBOL
MEANING
CPU
Central Processing Unit
EXB
GT card
EMA
Emergency Alarm Controller
PWR
Power Supply
IOC
I/O Controller
TSW
Time Division Switch
LC/TRK
Line/Trunk
MUX
Multiplexer
LC/TRK
MUX
TSW
PWR
PWR
CPU
(IOC)
EXB
EMA
PCPro
Printer, etc.
- Symbols -
: Circuit Card in PIR/TSWR
: Card in SV8500 Server
: Faults to be detected
: Speech Path
: Fault Information flow
(Note)
(Note)
Fault Information:
MJ, MN faults
Power OFF, blown fuse
CPU faults
Speech Path faults
RGU, Howler faults
CPU Clock faults
Software abnormal
behavior monitor
Ready
Clock
Ready
Clock
Firmware
faults
Howler,
Ringer fault
Howler,
Ringer fault
Fault
Information
Power off,
blown fuse