Intermittent outgoing call problem

[bbaits25]

Hello All,

One our branch locations is having a intermittent outgoing call issue, it happens randomly throughout the day, we have 12 POTS lines coming into the building. When a user makes an outgoing call they receive a pause for about 4-5 seconds, fast busy signal then dead air, I was able to capture one of the calls on the Avaya system status before the user hung up so I can identify if the call actually connected to the line (which it did, made sure the user was dialing 10 digits etc. ). The connected call was a long distance number and showed like it was connected on Line 2 of the POTS line. Would this be a carrier issue when making outgoing calls you receive a fast busy? After a few tries when you receive the fast busy a call will eventually go through, is the carrier maxed out at the there main switch and that's why you would receive this? Any thoughts or suggestions would be appreciated.

Thanks!

 

[vtphoneguy]

Seeing as you have POTS lines, check them at the demarc in front of the IPO with a test set. Try dialing the LD number and see if you get the same fast busy or if it goes out ok. That will eliminate or point the finger at telco.

 

[bbaits25]

I did do that with a butt set and made multiple calls out of the POTS lines, no issue. When it did occur I plugged my butt set into the affected line and was dead air (just like on the phone ). I put in a ticket with the local telco with the time it occured and dialed number. So i'm waiting on a response from them. Any other things I can try?

 

[vtphoneguy]

If you can dial out ok on your butt set then it's not telco. Do calls fail on the same trunk port or do they fail on multiple ports?

 

[bbaits25]

based on the two observed they were on two different trunk ports and on two different cards slot 2 and slot 3 on the Avaya IPO.

 

[amriddle01]

I suspect all 12 are not still live or you have unused ports in the line group

 

[bbaits25]

hmm what do you mean? All 12 lines are live and they are in the same line group to make outgoing calls.

 

[amriddle01]

Do you have some analogue trunk ports with nothing connected? What line group are they in? Have you tested all 12 for dialtone with a butt set, have you confirmed all cabling is OK?

 

[bbaits25]

nope all of them are connected. They are in the same line group 5. I have tested all 12 lines with a butt set. I haven't replaced any of the cabling running from the phone system into the demarc, it looks good when I was looking at it. Would cabling be the problem even if we recieve a fast busy and the phone system shows that it's connected to the call? That's what i'm questiononing

 

[amriddle01]

It's probably the line provider, but unless you checked everything I mentioned they would only ask you to do it anyway when you report it

 

[bbaits25]

ok thanks for the info.

 

[bbaits25]

Could it be possible that the main switch at the telco gets overloaded at certain points of the day where it max's out the number of calls it can go through and that would cause a fast busy signal?