Re: [VoiceOps] SS7 problems

[Paul Timmins]

The part of the company to call depends on what part of the company 
those trunks come from. Contact your AT account manager.


If they're IXC circuits, https://primeaccess.att.com/shell.cfm?section=4343

On 12/21/20 10:56 AM, Dave Frigen wrote:


We’ve narrowed this down to calls completing on our facilities (from 
likely least cost routing) down an AT TDM/SS7 terminating trunk 
group. We have no contacts for this trunk group, and even turned the 
trunk group down for a day thinking we would get a call, but didn’t. 
We’re still getting two calls to a single number, one call with caller 
on it and the other with dead air. The dual calls are coming from 
various service providers on this trunk group.


Anyone have any suggestions?

Dave

*From:* Dave Frigen 
*Sent:* Friday, December 11, 2020 11:55 AM
*To:* 'voiceops@voiceops.org' 
*Cc:* 'Rodney Young' ; 'Don Ross' 
; 'Barry Adair' 

*Subject:* SS7 problems

I know SS7 is not a big part of the voice world for many of you, but 
for those of you still exposed to it, just curious if anyone 
experienced any problems with SS7 signaling in the past couple of days 
where Terminating signaling times out and a 2^nd retry and new call 
set up for the call delivery occurs. The result was the phone ringing 
the customer, no one there. Second attempt successfully (if multiline 
hunt group) comes in on next line/trunk.


Trouble tickets reported:  Customers complaining about phones ringing, 
no one on the other end.


We traced the issue upstream in the SS7 signaling. The signaling was 
timing out after 15 seconds, creating call retry. We had our SS7 
provider look into it. No trouble found, but the “gremlins” 
mysteriously disappeared after the testing……concerned trouble may reoccur.


Any reference to anyone else experiencing these issues recently would 
be appreciated.


Dave

*Dave Frigen*

*/Chief Operating Officer /*

Wabash Communications CO-OP | www.wabash.net 

Office: 618.665.3311

 



WabashCom_CO-OP_RGB.png 


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Re: [VoiceOps] SS7 problems

[Dave Frigen]

We've narrowed this down to calls completing on our facilities (from likely
least cost routing) down an AT TDM/SS7 terminating trunk group. We have no
contacts for this trunk group, and even turned the trunk group down for a
day thinking we would get a call, but didn't. We're still getting two calls
to a single number, one call with caller on it and the other with dead air.
The dual calls are coming from various service providers on this trunk
group. 

 

Anyone have any suggestions?

 

Dave

 

From: Dave Frigen  
Sent: Friday, December 11, 2020 11:55 AM
To: 'voiceops@voiceops.org' 
Cc: 'Rodney Young' ; 'Don Ross' ;
'Barry Adair' 
Subject: SS7 problems

 

I know SS7 is not a big part of the voice world for many of you, but for
those of you still exposed to it, just curious if anyone experienced any
problems with SS7 signaling in the past couple of days where Terminating
signaling times out and a 2nd retry and new call set up for the call
delivery occurs. The result was the phone ringing the customer, no one
there. Second attempt successfully (if multiline hunt group) comes in on
next line/trunk.

 

Trouble tickets reported:  Customers complaining about phones ringing, no
one on the other end.

 

We traced the issue upstream in the SS7 signaling. The signaling was timing
out after 15 seconds, creating call retry. We had our SS7 provider look into
it. No trouble found, but the "gremlins" mysteriously disappeared after the
testing..concerned trouble may reoccur.

 

Any reference to anyone else experiencing these issues recently would be
appreciated.

 

Dave

 

Dave Frigen

Chief Operating Officer 

Wabash Communications CO-OP | www.wabash.net  

Office: 618.665.3311 

 

 


 

 

  

 

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