Analog line will not disconnect intermittently

[jrs93]

I have a customer with a 406v2 running manager 3.2.17 with analog lines. Every day Line 1 appears as if someone is on it even when there is no one even in the office. They reboot the system and it will still show up in use. This is intermittent throughout the day, but is frustrating because they forward that line to an answering service in the evenings. The loop currents are high on all of the lines, but only line one has this problem. I ticked disconnect clear on all of the lines, but they still are having this problem.

Any advice would be appreciated!

 

[disturbedone]

Check Call Status to see what the line is connected to. Check the lines to see if disconnect clear is actually provided by the network (use your test butt to do this) - setting the system to look for it means nothing if the network doesn't actually provide the feature.

 

[kwing112000]

I had the same issue with COX as a provider. It ended up the lines were not in spec with the Avaya docs. THe provider came in and tested and made some changes and we have been ok ever since.

 

[aarenot]

try playing with the disconnect clear units. in the line settings.

 

[jrs93]

Disturbedone,

I put a cpc (forward disconnect) tester on the lines and got 900ms. I set all the lines to 10ms disconnect clearing the ip office manager.

Kwing11200,

What specs are you talking about? The loop current, forward disconnect, voltage? It’s a channel banked T1 and all of the lines are way over spec for loop current. Some are 35-45ma. I don’t know if this would cause this problem, but I know it would cause other problems. I’m going to go put a loop current regulator on line one to see if that might fix it.

Aarenot,

The disconnect clears are ticked on all lines.

 

[r6wraith600]

Oh thank god I am not the only one having this issue. I have been searching for answers for over a year now with respects to this issue.

Even my head Avaya tech support person has been unable to give me any more feedback with respect to this problem other then the obvious answers you just were given.

I couldn't get anywhere with the Telco that provides the line (Bell) since they seem to know less then I do. I honestly had to explain to them what a disconnect timer was.

I know the disconnect is being sent as it was tested but the issue still happens.

however, when I reboot the switch it works fine for a random period of time.

 

[kwing112000]

What type of Channel bank? There were some known issues with certain channel banks. I will look for the line specs. I do not have them handy.

 

[jrs93]

R6wraith600,

Yep the customer support at Telco didn’t have a clue. They said that it was probably grounding at an extension. But it is never the same extension. It works fine for a few weeks or months and then comes back. Usually when I reboot the system it works fine for a little bit then happens again.

Kwing112000,

The channel bank is a Larscom (I believe), I’ll have to go back on site to get the model number.

 

[aarenot]

jrs93,

adit 500, or 600 channel bank had known issues. i got a private build from avaya a few months back for a similiar situation, and it helped. the units was what i was talking about on disconnect clear units on the analog tab, not the check box.

a band aid for this is install call status on a users pc, also phone manager. with phone manager open, you should be able to steal the call from call status, and dissconnect the call. i have put this band aid on before, and it has worked. the customer checks call status on ocasion, and clears the issue in the described fashion, until the telco can fix their issue. if you have a better solution let me know. i would love a better one, as i still have one with this same issue.

 

[jrs93]

I checked the loop current and disconnect signals on all the lines. It looks like half of the lines are above the recommended loop current rates-28ma to 34ma. The lines in question were within specs.

Aarenot,

You say that you received a private build from AVAYA and it helped. Did it solve it? I have a case number with AVAYA right now and I hope something comes of it. Do you think it is more of a Telco problem? I’ve had trouble on almost every channel bank that I’ve encountered unfortunately. Maybe I’ll just take the channel bank off and put in a t1 card because of all the time I’ve wasted trouble shooting this. All of the t1 cards I’ve put in have worked great.

 

[aarenot]

some channel banks have some issues with keeping within the national standards, or so avaya says. i have seen the telco test, and it appears to be true. depending on the tech, the telco, and their desire to deal with correcting it versus just saying there is nothing they can do is where you sit , as a rule. the patch i got from avaya was supposed to make the ipo accept out of standard parameters on the lines from the channel bank.

i would never pull the card out of the channel bank, and then slide it back in to reset the telcos equipment, but i have seen it done, and have the issue go away for a while. i told the customer what i would like to do, but that i could get fined for it if anyone found out. he said, well, let them fine me, and he did it.

on a different one, the private build has held for about 3 months now. this one also had issue with not ringing into the ipo. this was according to avaya a discrepency with the ring sine wave being out of spec, or something like that, i do not really recall for sure.
circuits have so many more features, and capabilities, i advise them on all ipos in order to take advantage of the investment in the ipo to take advantage of them. pots do not work well, or at all for so many features which the circuits do. far beyond just having abilities beyond one hunt group.

 

[jrs93]

Last night I received a call from Tory at AVAYA telling me that 3.2.54 would fix the problem with the channel bank. I went to the customer and upgraded their system from 3.2.17 to 3.2.54. So far so good- I’ll post back here to let everyone know if it works or not. I’ll give it a week or two.