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Fault detection

Following flow chart gives the sequences generally followed in clearing a particular fault in EWSD system. Fault detection. Automatic measures by EWSD System. Fault analysis. Fault signalling. Alarm confirmation. manual measures by O&M staff. Fault clearance with Diagnosis and removal.

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Fault detection

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  1. Following flow chart gives the sequences generally followed in clearing a particular fault in EWSD system. Fault detection Automatic measures by EWSD System Fault analysis Fault signalling Alarm confirmation manual measures by O&M staff Fault clearance with Diagnosis and removal Fig 1.0

  2. MML - CMD to read contents of HF.ARCHIVE file. DISP AENTRY : AFILE= HF.ARCHIVE, AENTRY=…….; SEL AENTRY : AFILE= HF.ARCHIVE, JN=….. , DATE=…... TIME=……, MSG=……, ALPRIO=………., DIR=…….; MML - CMD to read contents of AM . ALARM file. DISP ALARM : [ OBJECT = ] , [ALSTAT = ] , [ALPRIO = ] ; SRCH ALARM : [ OBJECT = ] , [ALSTAT = ] , [ALPRIO = ] , [MSGNO= ] ;

  3. Label on SYPD OBJECT LINE LOCKOUT LNLCKOUT LINE/TRUNK GROUPS LTG SYSTEM PANEL SYP TRUNK GROUP ALARM TGAL MAINTEN. ALARM MAL SERVICE ALARM SAL EXTERNAL ALARM EALEXCH EXT. DLU ALARM EALDLU SWITCHING NETWORK SN MESSAGE BUFFER MB CENTRAL UNITS CU RECOVERY RECOV SYSTEM OPERATOR SYOP CLOCK CLOCK ADMIN. ALARMS ADMINAL EXTERN. EQUIPM. DLU SIGNALLING LINK NO. 7 SIGLINK TIME INSECURE TIMINSEC COM. CHAN. SIGNALING CCS

  4. SN FAILURE WITH CONFIGURATIONMMN:SN0xx-0000 SGC DEFECT FAULT LOCATION:TSG-side-tsgSGC CONFIGURATION:TSG-side-tsgFROM: zzz TO: UNA SUPPLEMENTRY INFORMATION H’ zzzzzzzz zzzzzzzz zzzzzzzz zzzzzzzz H’ zzzzzzzz zzzzzzzz zzzzzzzz zzzzzzzz

  5. General Procedure for fault clearance in EWSD Y Y SYP 100 N END of procedure N Buzzer at SYPD on Press accept-key Set up session to exchange NP means NOT PROCESSED (ALARMS) DISP ALARM: ALSTAT = NP, OBJECT = xxx MSGNO is taken from the output of DISP ALARM cmd.. SRCH ALARM : MSGNO = xxx; IP means IN PROCESS i.e. ALARM is being processed. SET ALSTAT : MSGN = xxx, ALSTAT = IP DACT OUTSUP means output suppression on OMT has been deactivated DACT OUTSUP: LOCDEV =Systemdevice-FUOMT, Fault clearance According to MMN Relevant MMN details are taken from the fault message/printout. SYP101 is a standard procedure for ending the HW fault clearance. SYP 100 SRCH ALARM MSGNO = xxx; ACT OUTSUP; END

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