NEC SV9500 PRI slips

[djfriz]

I have a SV9500 that every night just after midnight I get a "slip occurs twice per day" warning and then at 4:30 everyday I get a "slip occurs 50 times per day" failure and the PRI resets. The local telco says they never see the PRI go down on their end. This happens every night.

Log below:

DFTD 20/05/21 08:31
SYSTEM MESSAGE 3-H [SUP] DIGITAL LINE WARNING
May 21 00:10
LP00-0-ACT
1:B1 03 00 00 00 00 00 00 2:00 00 00 00 00 00 00 00 3:00 00 00 00 00 00 00 00 4:00 00 00 00 00 00 00 00
5:00 00 00 00 00 00 00 00 6:00 00 00 00 00 00 00 00 7:00 00 00 00 00 00 00 00 8:00 00 00 00 00 00 00 00
Module Group: 1
Unit: 1
Group: 17
Kind of Fault: Slip occurs twice a day
RM: -
Time Slot No. of fault detection(The data is valid only when the kind of fault is 08H.): 0

DFTD 20/05/21 08:31
SYSTEM MESSAGE 3-I [SUP] DIGITAL LINE FAILURE
May 21 04:31
LP00-0-ACT
1:B1 03 00 00 00 00 00 00 2:00 00 00 00 00 00 00 00 3:00 00 00 00 00 00 00 00 4:00 00 00 00 00 00 00 00
5:00 00 00 00 00 00 00 00 6:00 00 00 00 00 00 00 00 7:00 00 00 00 00 00 00 00 8:00 00 00 00 00 00 00 00
Module Group: 1
Unit: 1
Group: 17
Kind of Fault: Slip occurs 50 times a day
Location of faulty circuit card(G : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(MG : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(U : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(G : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(MG : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(U : This data is valid when the kind of fault is 0FH.): 0
RM: -
Location of faulty circuit card(G : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(MG : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(U : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(G : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(MG : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(U : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(G : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(MG : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(U : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(G : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(MG : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(U : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(G : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(MG : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(U : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(G : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(MG : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(U : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(G : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(MG : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(U : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(G : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(MG : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(U : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(G : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(MG : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(U : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(G : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(MG : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(U : This data is valid when the kind of fault is 0FH.): 0

Thanks for any insight on this.

 

[belevedere]

Check your cross connects. Any activity on the frame could create a loose connection. If you have redundant time division, swich it over. If it happens at the same time and you are set for automatic switching in the time division, it may be that side with an issue.

 

[JuiceDanger]

What are your switches set too?

SW25 - Hardware
1-1 On
2-1 On
3-2 On
4-1 On
4-2 On

PRTA - Software
10-5 On
12-5 On
12-8 On
14-8 On