Pri link frequently down

[coolfalcon]

Dear all
we have connect our Nortel cs1000 to the PSTN using Pri link
the link is working but its frequently down and all channels are disabled
we deblock the trunk loop (ld 96 dis dch then ld 60 enll loop) the links becomes up for
short time then all channels disabled onc again.

 

[Firebird Scrambler]

You need to see if the link is clocking correctly and check this out in LD 60. Also refer to the history file to find out more on what is going on.

All the best

Firebird Scrambler
Meridian 1 / Succession and BCM / Norstar Programmer in the UK

http://www.linkedin.com/in/davidbromley

If it's working, then leave it alone!.

 

[janaya]

and open a ticket with the LEC. If this was working fine and then one day you started having problems, have the LEC check their side. Make them move jumper pairs on the CO switch.

 

[coolfalcon]

first thanks for reply
here the output when the link is down
PRI2 LOOP 54 - ENBL
REF CLK: DSBL
SERVICE RESTORE: NO
ALARM STATUS: OOS NO AUTO STRT
CH 01 - IDLE DID VOD * CH 02 - DSBL DID VOD *
CH 03 - DSBL DID VOD * CH 04 - DSBL DID VOD *
CH 05 - DSBL DID VOD * CH 06 - DSBL DID VOD *
CH 07 - DSBL DID VOD * CH 08 - DSBL DID VOD *
CH 09 - DSBL DID VOD * CH 10 - DSBL DID VOD *
CH 11 - DSBL DID VOD * CH 12 - DSBL DID VOD *
CH 13 - DSBL DID VOD * CH 14 - DSBL DID VOD *
CH 15 - DSBL DID VOD * CH 16 - DSBL DID VOD *
CH 17 - DSBL DID VOD * CH 18 - DSBL DID VOD *
CH 19 - DSBL DID VOD * CH 20 - DSBL DID VOD *
CH 21 - DSBL DID VOD * CH 22 - DSBL DID VOD *
CH 23 - DSBL DID VOD * CH 24 - DSBL DID VOD *
CH 25 - DSBL DID VOD * CH 26 - DSBL DID VOD *
CH 27 - DSBL DID VOD * CH 28 - DSBL DID VOD *
CH 29 - DSBL DID VOD * CH 30 - DSBL DID VOD *
CH 31 - DCH 15
.
>ld 96

DCH000
.stat dch 15

DCH 015 : OPER EST ACTV AUTO
DES : JTC
.

when the link is up
>ld 60

SL-1 --- SYS-12/AXE-10 SWE/NUMERIS/SWISS/TCNZ
/EUROISDN/SING/THAI/MSIA/INDO/CHNA
/INDI/PHLP
CHANNEL TIMESLOT MAPPING

DTI000
.
SL-1 NETWORK TIMESLOT
B-CHANNEL 1 -15 1 -15 1 -15
16-30 17-31 17-31
D-CHANNEL 31 16 16

.disl 54

OK
.enll 54

OK
.stat 54


PRI2 LOOP 54 - ENBL
REF CLK: DSBL
SERVICE RESTORE: YES
ALARM STATUS: ACCEPTABLE
CH 01 - IDLE DID VOD * CH 02 - IDLE DID VOD *
CH 03 - IDLE DID VOD * CH 04 - IDLE DID VOD *
CH 05 - IDLE DID VOD * CH 06 - IDLE DID VOD *
CH 07 - IDLE DID VOD * CH 08 - IDLE DID VOD *
CH 09 - IDLE DID VOD * CH 10 - IDLE DID VOD *
CH 11 - IDLE DID VOD * CH 12 - IDLE DID VOD *
CH 13 - IDLE DID VOD * CH 14 - IDLE DID VOD *
CH 15 - IDLE DID VOD * CH 16 - IDLE DID VOD *
CH 17 - IDLE DID VOD * CH 18 - IDLE DID VOD *
CH 19 - IDLE DID VOD * CH 20 - IDLE DID VOD *
CH 21 - IDLE DID VOD * CH 22 - IDLE DID VOD *
CH 23 - IDLE DID VOD * CH 24 - IDLE DID VOD *
CH 25 - IDLE DID VOD * CH 26 - IDLE DID VOD *
CH 27 - IDLE DID VOD * CH 28 - IDLE DID VOD *
CH 29 - IDLE DID VOD * CH 30 - IDLE DID VOD *
CH 31 - DCH 15
.
its remains up for only few moments

 

[RichardJulien]

Looks like your clock is disabled. This looks like your problem. PRI needs clock for synchronization. Try setting up your reference clocks (Primary and secondary) in LD 73 and then enabling your clock in Ld 60. That should solve your issue:

LD 73
REQ CHG
TYPE PRI2
FEAT SYTI
CLKN <loop number of card containing clock controller>
PREF0 <loop number for primary reference>
PREF1 <loop number for secondary reference>

You may have to go through this process twice to ensure that the CLKN and the PREF0 are the same loop number.

Not sure whether the prompts are totally correct as I am responding from memory here but this should put you on the right track.

 

[bignose21]

Like above check clocking if un sure go LD 22 prt the cequ and that will tell you the gateway the card (associated with PRI2 54) is in then in LD 60 ssck l s (l=loop and s=shelf obtained from cequ. Also as this is an E1 another Layer 1 issue you might be having is incorrect setting on CRC4.

LD 73
REQ prt
TYPE pri2
FEAT lpti
LOOP 54

top of the printout MFF can be CRC (CRC4 is set to on) or AFF (CRC4 is set to off).

If changing the CRC setings disable the DCH in LD 96 and disable the loop and rcnt the counters in LD 60. Make the change in 73 then enable.

 

[coolfalcon]

dear sir
thanks alot for your help
first i changed the framing to CRC
the reference clock is in loop 34
REQ prt

TYPE syti

SCH0111
TYPE pri2

FEAT syti


PREF CK0 34
SREF CK0 FREE RUN
PREF CK1 34
SREF CK1 FREE RUN

CCGD 15
CCAR 15
EFCS YES

how to set this reference clock to loop 54
thanks alot in advance

 

[coolfalcon]

loop 34 is the refernce clock gives the clock to both shelfs through the clock controller

 

[coolfalcon]

we already did that. its connected to the two shelfs

 

[bignose21]

Looking at your printout you are on an option 61/81 so your clock references in ld 73 but you also need to cable between the clock controllers and the reference PRI(s)

 

[coolfalcon]

our system is cs1000 upgraded from option 81 . the clock controllers are connected to the refernce PRI.
do you advice me to switch off the clock controller of the second shelf for a minute and then siwtch it on once again?

 

[bignose21]

You are talking about loop 54 all the time but your clocking is from loop 34 is this another PSTN link and is it cabled to the PREF of both clocks?

 

[Firebird Scrambler]

What type of ISDN 30 card is being used?. Can you be sure that it has a clocking daughterboard card installed on it. On the ISDN 30 faceplate, what LED's are being shown as you should be seeing 3 Green LED's. The important one is the "CC" for clocking.

All the best

Firebird Scrambler
Meridian 1 / Succession and BCM / Norstar Programmer in the UK

http://www.linkedin.com/in/davidbromley

If it's working, then leave it alone!.