T-1 dead 1

[snajo617]

The past few days my T-1 has been flaking out on my s8710. Channels would start going down and I would busy and release the card and everything would come back up for a while. I submitted a ticket with Verizon, who owns the circuit. I came in this morning and status lights 2 and 4 are solid red and all channels are out-of-service. Verizon sent me a message that said:

Hello. We tested clean to the smartjack located at your customer's premises for 1 hour and 2 minutes, but we were unable to loop your customer's CSU at that location. We will hold the ticket for 24 hours awaiting your reply. Thank you.

I called today and they will be sending out a tech.
I feel like I have checked everything. All connections are good. Switched out the card and the CSU Module on the back. no programing has changed. Any advice would be appreciated. Thanks.

 

[joe2938]

do a test board (board location) and post results, also is the smart jack in an alarm status? I still think this may be a Verizon issue

 

[dialtonebone]

test board 01a03" or whatever the board number is and post the results. Be sure to wrap the results

in the code tag for readability

Also, plus a loop back jack into your CSU/PRI port on YOUR equipment and run the same tests again, post the results.

Also, post "display ds1 XXXX"

 

[snajo617]

[PRE]Port Mtce Name Alt. Name Test No Result Error Code

03C14 UDS1-BD 138 FAIL
03C14 UDS1-BD 139 PASS
03C14 UDS1-BD 140 PASS
03C14 UDS1-BD 141 PASS
03C14 UDS1-BD 142 PASS
03C14 UDS1-BD 143 PASS
03C14 UDS1-BD 144 PASS
03C14 UDS1-BD 145 PASS
03C14 UDS1-BD 146 PASS
03C14 UDS1-BD 1227 PASS
03C1401 TIE-DS1 0012/001 136 ABORT 1020
03C1401 TIE-DS1 0012/001 36 ABORT 1006
03C1402 TIE-DS1 0012/002 136 ABORT 1020
03C1402 TIE-DS1 0012/002 36 ABORT 1006[/PRE]

And that continues for all 24 ports with same tests and same error codes.

[pre] DS1 CIRCUIT PACK

LOCATION: 03C14 NAME: MCI T-1 TRUNK
BIT RATE: 1.544 LINE CODING: b8zs
LINE COMPENSATION: 1 FRAMING MODE: esf
SIGNALING MODE: robbed-bit


INTERFACE COMPANDING: mulaw
IDLE CODE: 11111111



SLIP DETECTION? n NEAR-END CSU TYPE: intergrated[/pre]

 

[dialtonebone]

Test 138 means physical layer issues usually (cable unplugged, damaged etc)

Go plug a loop back jack in to your system and see if test 138 passes after. If so, replace the cable between your smartjack/NIU and your PBX. If that doesn't work, then maybe your carrier is the problem.

 

[snajo617]

Found the problem! Thank you Mr Carroll!
I started putting loopbacks in the path of the T-1 and found what seems to be a loose connection. Thanks for the help!

 

[dialtonebone]

No problem