One of our T1 PRI lines goes down frequently

[Jeff1215]

We have 2 T1 PRI lines. Since last week, one of the lines went down frequently by red alarm. I called carrier and opened a ticket. But the issue keeps happen even they claimed to replace the circuit.

.stat 4

PRI* TRK LOOP 4 - ENBL
FFMT/LCMT/YALMT: ESF/B8Z/FDL
TRACKING
SERVICE RESTORE: YES
YEL ALM PROCESS: YES
ALARM STATUS : NO ALARM
CH 01 - BUSY DID 3VCE * CH 02 - IDLE DID 3VCE *
CH 03 - IDLE DID 3VCE * CH 04 - IDLE DID 3VCE *
CH 05 - IDLE DID 3VCE * CH 06 - IDLE DID 3VCE *
CH 07 - IDLE DID 3VCE * CH 08 - IDLE DID 3VCE *
CH 09 - IDLE DID 3VCE * CH 10 - IDLE DID 3VCE *
CH 11 - IDLE DID 3VCE * CH 12 - IDLE DID 3VCE *
CH 13 - IDLE DID 3VCE * CH 14 - IDLE DID 3VCE *
CH 15 - IDLE DID 3VCE * CH 16 - IDLE DID 3VCE *
CH 17 - IDLE DID 3VCE * CH 18 - IDLE DID 3VCE *
CH 19 - IDLE DID 3VCE * CH 20 - IDLE DID 3VCE *
CH 21 - IDLE DID 3VCE * CH 22 - IDLE DID 3VCE *
CH 23 - IDLE DID 3VCE * CH 24 - DCH 10

PRI* TRK LOOP 4 - ENBL
FFMT/LCMT/YALMT: ESF/B8Z/FDL
SERVICE RESTORE: YES
YEL ALM PROCESS: YES
ALARM STATUS : RED
CH 01 - DSBL DID 3VCE * CH 02 - DSBL DID 3VCE *
CH 03 - DSBL DID 3VCE * CH 04 - DSBL DID 3VCE *
CH 05 - DSBL DID 3VCE * CH 06 - DSBL DID 3VCE *
CH 07 - DSBL DID 3VCE * CH 08 - DSBL DID 3VCE *
CH 09 - DSBL DID 3VCE * CH 10 - DSBL DID 3VCE *
CH 11 - DSBL DID 3VCE * CH 12 - DSBL DID 3VCE *
CH 13 - DSBL DID 3VCE * CH 14 - DSBL DID 3VCE *
CH 15 - DSBL DID 3VCE * CH 16 - DSBL DID 3VCE *
CH 17 - DSBL DID 3VCE * CH 18 - DSBL DID 3VCE *
CH 19 - DSBL DID 3VCE * CH 20 - DSBL DID 3VCE *
CH 21 - DSBL DID 3VCE * CH 22 - DSBL DID 3VCE *
CH 23 - DSBL DID 3VCE * CH 24 - DCH 10
.lcnt 4

PRI LOOP 4
TRSH CNT:
BPV -000
SLIPD -000
SLIPR -000
CRC -000
LOSFA -018
OS_BPV -000
OS_LOSFA-004
OS_YEL -000
.ssck 0
ENBL
STANDBY
CLOCK CONTROLLER - TRACK ON LOOP 4
PREF - 4
SREF - 25
AUTO SWREF CLK - ENBL
NO ERROR

LD73
REQ prt TYPE ddb

PREF 4
SREF 25

TRSH 00
RALM 128
BIPC 128
LFAC 128
BIPV 4 4
SRTK 1 3600
SRNT 1 1
LFAL 10240 10240
SRIM 1
SRMM 127
ICS

 

[GHTROUT]

Keep reporting it is what I'd do. But in the mean time, bypass your CSU and let it run for a few days. You may find that eliminate the problem (but you'll have to replace it then)

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[terryjames]

I would add ld 60 in the background routines and it will
do a reset counters everytime the system does a audit
and check if you are getting LOS's durning the time frame
of the audits and let the system clock on loop 25 to see
if it is a timing issue. What does the D-Channel messages
say? Release Red Alarm? What do the 2 T-1s connect to?
A CO or another PBX?

 

[phonz1]

most likely it's the Telco.....