Intermittent Tie Line

[lenzhin]

we have seen intermittent outtages between two opt11's. Here is the d-channel messages I caught during a call to the remote site:

PRI* TRK LOOP 3 - ENBL
FFMT/LCMT/YALMT: ESF/B8Z/FDL
SERVICE RESTORE: YES
YEL ALM PROCESS: YES
ALARM STATUS : NO ALARM
CH 01 - IDLE TIE 3VCE * CH 02 - IDLE TIE 3VCE *
CH 03 - IDLE TIE 3VCE * CH 04 - IDLE TIE 3VCE *
CH 05 - IDLE TIE 3VCE * CH 06 - IDLE TIE 3VCE *
CH 07 - IDLE TIE 3VCE * CH 08 - IDLE TIE 3VCE *
CH 09 - IDLE TIE 3VCE * CH 10 - IDLE TIE 3VCE *
CH 11 - IDLE TIE 3VCE * CH 12 - IDLE TIE 3VCE *
CH 13 - IDLE TIE 3VCE * CH 14 - IDLE TIE 3VCE *
CH 15 - IDLE TIE 3VCE * CH 16 - IDLE TIE 3VCE *
CH 17 - IDLE TIE 3VCE * CH 18 - IDLE TIE 3VCE *
CH 19 - IDLE TIE 3VCE * CH 20 - IDLE TIE 3VCE *
CH 21 - IDLE TIE 3VCE * CH 22 - IDLE TIE 3VCE *
CH 23 - IDLE TIE 3VCE * CH 24 - DCH 6
.
DCH 6 OMSG SETUP REF 00000017 CH 3 23 TOD 15:10:04
PROGRESS: ORIG ADDR IS NOT ISDN
CALLING #:5249 NUM PLAN: PRIVATE/ABBREVIATED (CDP)
CALLED #:1001302 NUM PLAN: PRIVATE/ABBREVIATED (CDP)

DCH 6 IMSG ALERT REF 00000017 CH 3 23 TOD 15:10:06

DCH 6 IMSG CONNECT REF 00000017 CH 3 23 TOD 15:10:08

DCH 6 OMSG CONN ACK REF 00000017 CH 3 23 TOD 15:10:08

DTA021 3

DCH: 6 O0CBD6912
00000024
DCH: 6 I 0CBD7472
FFFFC826
DCH055 DCH: 6 RLS RED ALRM TIME: 15:10:14 3/29/2011
STAT 3

PRI* TRK LOOP 3 - ENBL
FFMT/LCMT/YALMT: ESF/B8Z/FDL
SERVICE RESTORE: YES
YEL ALM PROCESS: YES
ALARM STATUS : RED
CH 01 - DSBL TIE 3VCE * CH 02 - DSBL TIE 3VCE *
CH 03 - DSBL TIE 3VCE * CH 04 - DSBL TIE 3VCE *
CH 05 - DSBL TIE 3VCE * CH 06 - DSBL TIE 3VCE *
CH 07 - DSBL TIE 3VCE * CH 08 - DSBL TIE 3VCE *
CH 09 - DSBL TIE 3VCE * CH 10 - DSBL TIE 3VCE *
CH 11 - DSBL TIE 3VCE * CH 12 - DSBL TIE 3VCE *
CH 13 - DSBL TIE 3VCE * CH 14 - DSBL TIE 3VCE *
CH 15 - DSBL TIE 3VCE * CH 16 - DSBL TIE 3VCE *
CH 17 - DSBL TIE 3VCE * CH 18 - DSBL TIE 3VCE *
CH 19 - DSBL TIE 3VCE * CH 20 - DSBL TIE 3VCE *
CH 21 - DSBL TIE 3VCE * CH 22 - DSBL TIE 3VCE *
CH 23 - BUSY TIE 3VCE * CH 24 - DCH 6
.
DTA022 3

DTA023 3

DCH: 6 I 0CBFD276
FFFFC41A
DCH054 DCH: 6 EST REMOTE TIME: 15:11:30 3/29/2011

DTA021 3

DCH: 6 O0CBFFDB6
00000024
DCH: 6 I 0CC00896
FFFFC826
DCH055 DCH: 6 RLS RED ALRM TIME: 15:11:38 3/29/2011

Any ideas what these mean? or what could be causing the outtages?

 

[KillianK]

why not try and force download the msdl again....

do a stat msdl.. in ld 96

dis msdl xx

enl msdl xx fdl

 

[lenzhin]

Turns out the telco found water on the cables!

 

[nessman]

Check the telco's network interface (aka "smart jack") and see what the lights are showing, and the CSU/DSU between their T1 and your switch.

You can also look for red/yellow alarms on your maintenance terminal. Also try LCNT in LD 60 to give you an idea of T1 issues from the telco. If things are working well, you should see all 0's in the past 24 hours.

Also try a loopback adapter into the TMDI card to determine if the card itself if flaky - if the red alarm goes away with a loopback adapter and comes back when you plug the T1 back in - chances are it's a telco issue.

I can't tell you how many calls I get for down T1's during the spring thaw and periods of very rainy weather.