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#260979 10/01/07 05:53 AM
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We have a customer that has a PRI with One Communications as the provider, however, AT&T provides the smart jack. The circuit has been going up and down and they have had calls that just got cutoff in mid-sentence. We have seen errors in the Norstar system but One Communications says that they show no errors or alarms. What would be the reason for our system showing alarms and errors and their logs show it clean during those times?

Thanks

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#260980 10/01/07 06:09 AM
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Is it possible you are seeing protocol errors just on the d-channel? Also has the T1 been stress tested yet?


I Swear I did not touch anything bash
#260981 10/01/07 06:18 AM
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Some of the issues that they are having are that the some of the B Channels go down but apparently the D channel stays up. Sometimes the D channel goes down.

No, the PRI has not been stress tested.

#260982 10/01/07 07:16 AM
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I would start by having the span tested to verify the physical link is good. If so you can start to verify things like protocol and b-channel service messaging


I Swear I did not touch anything bash
#260983 10/01/07 07:22 AM
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The protocol is OK. What do you mean by B-channel service messaging? I still don't understand why we would see alarms and errors but they don't.

#260984 10/01/07 07:27 AM
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did they check for alarms and errors in their switch? or at the t1 level? if the errors are in one direction they may not see them until the span is tested. b-chan service messaging is a setting that tells the local switch when a b-channel is in or out of service in your PBX. Not all PBX's will support this.


I Swear I did not touch anything bash
#260985 10/01/07 08:34 AM
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I'm having the same issue with a ONE PRI and a Norstar switch.

Verizon carries the copper, and we have had numerous vendor meetings. I replaced my T1 card as a measure of good faith, which made no difference.
Customer still loses service once or twice a day, ONE swears it off. Verizon says it's ONE, and I'm losing my mind here.


If you can read this, you're in range.
#260986 10/02/07 03:50 AM
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I've had an issue like this where it turned out to be a compatibility issues between the last repeater in the loop and my smart jack, which wasn't apparent to the CO because the loop looked clean to them.

Basically I had to call them once a week for a month in order to get them to send someone out to stress the line where they then found the repeater issue. Have also seen a bad card in a shelf cause problems like this for another guy.

#260987 10/18/07 12:13 PM
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I had an issue with a LOGIX PRI just last month where you would get busies in the evening. LOGIX would always say "test good to the csu". So one night I went to the customer site & found alarms on my PBX & the circuit appeared to go "up" & "down" for a while, then just went down. The LOGIX CSR had the gall to tell me she could still see the csu, but, not my PBX.

The next day LOGIX pushed a.t.&t. & a bad repeater was found on the circuit......


call

I posted the entire event in the installers forum for those who have not enjoyed it. The title of the post is "After Hours"...


www.phonelinetech.com


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#260988 10/22/07 04:56 AM
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I've had similar problems (3 times). Turned out to be a protocol mismatch between the backbone provider (at&t) and the intermediate provider that provisioned the circuit (1 communications).

What happens is the circuit is slowly slipping frames and after a while the PBX drops the circuit to re-sync.

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