Bad Port 1 on ISDN-PRI T1

[mikej97204]

I have a DS3 with all 28 T1's active as ISDN-PRI circuits. I have one T1 that port one will not go in-service. It stays at OOS/FE-PINS and MTCE Busy=yes with I do a status trunk. If I do a test port 01c0801 tests 36, 255, and 256 pass but test 257 has Abort with a error code of 1116.

The other ports are in-service and have been used for out bound calls. I've swapped the TN464F twice and tried 3 T1 cables. If I move the cable to another slot in my G3r, the bad port follows the cable. If I move the end at the patch panel on the Adtran MX2800 mux, it stays with channel 20 on the mux.

All of this tells me that it appears to be a problem somewhere between the patch panel and the carrier. But what is confusing to me is that it's only port 1 of that T1 that stays out of service. If it was a bad patch panel jack or something bad within the mux or bad at the carrier, I would expect the whole T1 to not come into service, not just one channel. I've done all the tests and checks that I can think of. So I'm stumped.

I could just busy out that port and leave it, but I'd really like to find out what is going on here. Does anyone have a suggestion of anything else I can try? Or any idea why one channel of one T1 of 28 T1's in this DS3 won't go in-service?

Thanks for any help.

Mike

 

[DOIMPRO]

odd, very odd, you try a rel port 01c0801 ?

Surprise! Most loopback jacks are located conveniently behind the ear and above the leg

 

[mikej97204]

Yes, I busied it out and released it a bunch of times. I did find out what the problem was though. Since I had exhaused everything I could think to try, I opened a ticket with Verizon. When the tech checked it he found that channel one of that T1 had not been built. The person that had set the last 4 up when we installed them a few weeks ago built port 2 through 24 on that T1 but missed port 1. Once he built it, the circuit came right up.

I'm glad that is all it was.

Thanks.

Mike

 

[wildcard100001]

Call the carrier and ask they check that b channel on the circuit. Chances are they need to busy and release it themselves.

Worked for me..same issue.

Wildcard