Group Switch Clock Alarm (88)

[cpux10]

Hi all,

I'm getting Alarm 88 (Group Switch Module Clock Alarm) on a 5 LIM system with duplicated GS.
Here are the regarding printouts:

<scicp;
MASTER LIM/GSM CONFIGURATION DATA
MASTER 2ND MASTER 3RD
LIM GSM LIM GSM LIM
1 0 2 3
END

<scexp;
EXTERNAL SYNC RECEIVING LINES DATA
MASTER LIM STATUS
FIRST CHOICE 1-2-20-0 SYNC RECEIVING
SECOND CHOICE 1-0-20-0 OK
THIRD CHOICE NOT PRESENT
END

<gjlsprint=all;
GROUP JUNCTOR LINE STATUS
EQU = 1-0-00-0 GS-MULT 0-0 MCCL
GS SIDE 0 ACTIVE ACTIVATED NOT SIGNALLING MASTER LINK
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 1110 0000


EQU = 1-1-00-0 GS-MULT 0-1
GS SIDE 0 ACTIVE ACTIVATED SIGNALLING NO CLOCK CONTROL
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0110 0000


EQU = 2-0-00-0 GS-MULT 0-2
GS SIDE 0 ACTIVE ACTIVATED SIGNALLING SYNC RECEIVING
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0110 0000


EQU = 2-1-00-0 GS-MULT 0-3 RCCL
GS SIDE 0 ACTIVE ACTIVATED NOT SIGNALLING CLOCK CONTROL
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0110 0000


EQU = 3-0-00-0 GS-MULT 0-4 ACCL
GS SIDE 0 ACTIVE ACTIVATED SIGNALLING CLOCK CONTROL
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0010 0000 0010 0000


EQU = 3-1-00-0 GS-MULT 0-5
GS SIDE 0 ACTIVE ACTIVATED NOT SIGNALLING SYNC RECEIVING
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0110 0000


EQU = 4-0-00-0 GS-MULT 0-6
GS SIDE 0 ACTIVE ACTIVATED SIGNALLING CLOCK CONTROL
SYNC RECEIVING
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0110 0000


EQU = 4-1-00-0 GS-MULT 0-7
GS SIDE 0 ACTIVE ACTIVATED NOT SIGNALLING NO CLOCK CONTROL
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0110 0000


EQU = 5-0-00-0 GS-MULT 0-8
GS SIDE 0 ACTIVE ACTIVATED NOT SIGNALLING NO CLOCK CONTROL
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0110 0000


EQU = 5-1-00-0 GS-MULT 0-9
GS SIDE 0 ACTIVE ACTIVATED SIGNALLING SYNC RECEIVING
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0110 0000

END

The display on both GCU2 boards is blinking between 1-0 and E-5
I thought the problem may be the RCCL not signaling so I changed it to GS-MULT 0-2 but that didn't fix the problem.
Should I change the MCCL to GS-MULT 0-1?

Thanks

 

[pawshman]

you need to run the GJLSP print twice

 

[cpux10]

If you mean the GJLSP after I changed the RCCL, here it is:

<gjlsprint=all;
GROUP JUNCTOR LINE STATUS
EQU = 1-0-00-0 GS-MULT 0-0 MCCL
GS SIDE 0 ACTIVE ACTIVATED NOT SIGNALLING MASTER LINK
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0010 0000


EQU = 1-1-00-0 GS-MULT 0-1
GS SIDE 0 ACTIVE ACTIVATED SIGNALLING NO CLOCK CONTROL
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0010 0000


EQU = 2-0-00-0 GS-MULT 0-2 RCCL
GS SIDE 0 ACTIVE ACTIVATED SIGNALLING CLOCK CONTROL
SYNC RECEIVING
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0010 0000


EQU = 2-1-00-0 GS-MULT 0-3
GS SIDE 0 ACTIVE ACTIVATED NOT SIGNALLING NO CLOCK CONTROL
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0010 0000


EQU = 3-0-00-0 GS-MULT 0-4 ACCL
GS SIDE 0 ACTIVE ACTIVATED SIGNALLING CLOCK CONTROL
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0010 0000


EQU = 3-1-00-0 GS-MULT 0-5
GS SIDE 0 ACTIVE ACTIVATED NOT SIGNALLING SYNC RECEIVING
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0010 0000


EQU = 4-0-00-0 GS-MULT 0-6
GS SIDE 0 ACTIVE ACTIVATED SIGNALLING CLOCK CONTROL
SYNC RECEIVING
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0010 0000


EQU = 4-1-00-0 GS-MULT 0-7
GS SIDE 0 ACTIVE ACTIVATED NOT SIGNALLING NO CLOCK CONTROL
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0010 0000


EQU = 5-0-00-0 GS-MULT 0-8
GS SIDE 0 ACTIVE ACTIVATED NOT SIGNALLING NO CLOCK CONTROL
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0010 0000


EQU = 5-1-00-0 GS-MULT 0-9
GS SIDE 0 ACTIVE ACTIVATED SIGNALLING SYNC RECEIVING
SIDE 0 ALARM 0000 0000 0010 0000
SIDE 1 ALARM 0000 0000 0010 0000

END

But still the status on the GCU2 boards is the same (blinking 1-0 and E-5)

 

[pawshman]

what I mean is when "ever" you run a GJLSP print, you must run it twice, ignore the first print-out and action what ever the result is from the second time.

you run the prints consecutivley, one after the other

also try

SCEXI
and
SCICI

then

SFCEI

 

[trrep]

hi ,
i believe scexi and sfcei will not help,

you have a problem with the Clock bus in the GSM byself.

mostly that's a problem from the GCU2 board.
normaly you should contact your service provider to fix this problem.

another (selfmade and dangerous) solution can be: just pull out the GCU2 boards and put them back.(or switch off the GS)
attention: do this only in a low traffic time !! you will got disturbances in the system, of course !
if you are not lucky, you will have the same problem after wards!
this version is dangerous, specialy if you don't have any spare boards for the GS !

best regards

 

[program0]

you need to be careful here that your not looking at something complex when in fact it could be something quite simple.
We had this issue a while ago that turns out to be nothing more than a bad clock source. also, blips on megastreams can cause these.
i wouldnt advise pulling GCU2 cards without following the proper procedures (ALEX) for blocking and ending the group-switch first.
by experience we found this to be a no-no as the synch can become stuffed very easily

 

[kings1]

cpux10,

you have to define you sychronisation again. Remove the existing synch. Your MCCL=LIM1 RCCL=LIM2 and ACCL=LIM3. Your external synch is FEML=lim1 and SEML=lim1.


Your SEML must be on lim 2. If you dont have a ISDN on this lim then only set FEML or fing=d another lim with ISDN and make that lim RCCL.

So in summary

MCCL = Lim 1 FEML = in Lim 1
RCCL = Lim 2 SEML = in Lim 2
ACCL = Lim 3

Regards,

Kings

 

[himdp]

Hi Kings1, FEML and SEML must be in the same LIM i.e. the master LIM. If you want external sync in LIM 1 and LIM 2 they must be assigned as FEML and FESML.