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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
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