NEC UNIVERGE SV8500 - Control System Fault - Fault Occurs Intermittently on ACT Side

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CHAPTER 5 Operation Procedure for System with PIR
4.7.1 Control System Fault - Fault Occurs Intermittently on ACT side
Faulty Situation:
• Fault occurs intermittently.
•[0-C] ~ [0-J] CPU Failure
•[1-C] Both TSW Write Failure
•[1-D] TSW Write Failure
•[3-D], [3-E] Lock-up Failure (Permanent/Temporary)
[For Dual-Configuration System]
(1) Replace the related circuit cards one by one referring to each page:
• CPU Card Replacement Procedure
• EMA Card Replacement Procedure
• EXB (EXB-PIR/EXB-TSW) Card Replacement Procedure
• GT Card Replacement Procedure
• Replacement Procedure of TSW (Time Division Switch) Circuit Card
• Replacement Procedure of MUX (Multiplexer) Circuit Card
(2) Change over the CPU or speech path referring to SYSTEM CONTROL PROCEDURES.
(3) Make test calls (Station-to-Station call) to see if the fault occurs again.
(4) After completing all steps, place the related cards into ACT mode.
(5) Check to see that any fault information is displayed
[For Single-Configuration System]
(1) Replace the related circuit cards one by one referring to each page:
• CPU Card Replacement Procedure
• EMA Card Replacement Procedure
• EXB (EXB-PIR/EXB-TSW) Card Replacement Procedure
• GT Card Replacement Procedure