How To Troubleshoot A T1 Or T3 Circuit?

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How To Troubleshoot A T1 Or T3 Circuit?
Post Description: how to troubleshoot a t1 or t3 circuit - hello, i have a backend t1 circuit that i purchased from my local provider and last night it went down. at first we were getting random errors, then it changed to hard down
Tags: how, to, troubleshoot, a, t1, or, t3, circuit?
This Post Was Posted On Jul 21, 2010 By Darill #3501

How To Troubleshoot A T1 Or T3 Circuit? by Darill

hello, i have a backend t1 circuit that i purchased from my local provider and last night it went down. at first we were getting random errors, then it changed to hard down. so when i called my provider they want us to check our inside wiring. so i had our tech check to make sure our connections were good. i called them again and told them that my connections all the way to the demarc are good. but they said they dont see a problem when its crearly that my circuit is down. im not getting any data, plus on the router the interface is down down.

do you have any suggestions on how i can move forward with this. i am stuck and not sure how to proceed.

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Milind

#4546 1

try local loop and remote loop

Oct 19, 2010 Reply Report abuse

networktec234

#4232 2

what you need to do is this:

1. make 100% sure its not your inside wiring thats causing the problem. go to the demarc and connect a loopback jack to the end of the cable (B on pic) that is going to your router, then check the interface on your router. you should see the alarm go away. if you see the interface up, then its definitely not your connections. but if you still can't see your interface up, then you probably have to troubleshoot your connections further, change the cables and/or change the ports on the patch panel. and test again.

2. if you tested ok on your inside wiring. call your provider again and tell them you doublechecked your insidewiring and you dont see a problem, ask if they can connect you to a tester.. once you are with the tester, tell them that your troubleshooting and you suspect there is a problem beyond the demarc,

if you have a looping plug, tell them if you can give them a loop back at the demarc so they can check connectivity to the demarc.

once the tester tells you to put the loopack, put it in the demarc jack (A on the picture). (not your wiring) two things will happen..

1. the tester will see the loop, if they see it. ask them to test to it. send pasterns and test for like 2 minutes to see if they see any errors. if they test clean, remove the loopback and connect your router and see if it comes up.

2. if the tester says they can't see a loopback, they you've proved that there is a problem at the demarc.

ask them to dispatch a tech to the demarc (aka MPOE) to come and test this circuit because they can't see your loop. they will most likely agree with you.

they will inform you that they will send a tech to the site, but if they test good, you will be charged.. they have to tell you about the charges by law. so if you agree, tell them ok. ofcourse, you wont be charge if there is a problem and they fix it, so if you've gotten to this point, its most likely that the problems are with the provider so you wont be charge.

Jul 21, 2010 Reply Report abuse