CO Trunk Blank Calls

[techma1]

Need your help /advise to fix a problem at one of my sites.The issue, Blank calls received by operator ,in a hour at least 10- 15 such calls landing.

PBX – g3si Version 6

Following actions were done by our technical team ,but still the problem persists

Checked the system side cabling
Configured new trunk group ,deleted old trunk group
Test board ( CO TRUNK CARD TN747B V11/13) Passed.
Cards were swapped
System reset – 4 done .

 

[AvayaTier3]

Most likely, your Bell company is working on your incoming cable facilities and is causing the phantom calls. I would not expect that it's been going on for a long time and that the problem will also disappear.

You can change trunk-group programming and turn on ACA (Automatic Circuit Assurance) to report short duration calls with specific trunk numbers.



A great teacher, does not provide answers, but methods to teach others "How and where to find the answers"

bsh

35 years Bell, AT&T, Lucent, Avaya
Tier 3 for 25 years and counting

http://bshtele.com

 

[techma1]

where would the reports go to?

 

[dufus2506]

Depending on the line type, the CO card type, and it's configuration, it could just be seek pulse.

If you have ground start lines that are setup as loop start, the CO may be sensing something near ground, and sending a "seek pulse" to see if it connects to ground.

PBX's frequently see that pulse as an incoming call.

Check your configuration. If you have loop start lines, make sure the trunk group is setup for loop start. Same for ground start.

If all of that is correct, I'd make sure you have a proper ground on the cabinet/gateway that's connected to the CO lines.



Carpe dialem! (Seize the line!)

 

[AvayaTier3]

check out this link for aca programming screens, buttons, reporting

http://www.tek-tips.com/viewthread.cfm?qid=1587285&page=1

A great teacher, does not provide answers, but methods to teach others "How and where to find the answers"

bsh

35 years Bell, AT&T, Lucent, Avaya
Tier 3 for 25 years and counting

http://bshtele.com

 

[4merAvaya]

Add a Trunk-ID button on the console.

Kevin