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I don't work with SS7, so this may just be a coincidence, but 2 days
ago I was having VoIP Troubles that appeared to be with traffic
Traversing a Telia circuit between my endpoint and my provider. Did
not affect all traffic, not even entire /24's. It was like Telia
was dropping some UDP traffic for some IPs. Same symptoms that you
describe though, the the call attempted to be setup, but the ACK
never made it back, call was canceled and retried. The ACK might
get back on the 2nd or 3rd attempt. Removing Telia from the route
path on Wednesday fixed the issue for us, and I haven't had any more
reports since. <br>
<br>
Nate<br>
<br>
<div class="moz-cite-prefix">On 12/11/2020 11:55 AM, Dave Frigen
wrote:<br>
</div>
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<p class="MsoNormal">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<sup>nd</sup> 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.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Trouble tickets reported: Customers
complaining about phones ringing, no one on the other end.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">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.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any reference to anyone else experiencing
these issues recently would be appreciated.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dave<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:22.0pt">Dave
Frigen<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><i><span style="font-size:12.0pt">Chief
Operating Officer <o:p></o:p></span></i></b></p>
<p class="MsoNormal">Wabash Communications CO-OP |
<a class="moz-txt-link-abbreviated" href="http://www.wabash.net">www.wabash.net</a><o:p></o:p></p>
<p class="MsoNormal">Office: 618.665.3311 <o:p></o:p></p>
<p class="MsoNormal">
<o:p></o:p></p>
<p class="MsoNormal"><a moz-do-not-send="true"
href="https://www.facebook.com/wabashcommunicationscoop/"><span
style="color:windowtext;text-decoration:none"><img
style="width:.2708in;height:.2708in"
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src="cid:part1.03010606.01050908@blastcomm.com"
border="0" height="26" width="26"></span></a><a
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src="cid:part7.03080800.00070609@blastcomm.com"
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><a moz-do-not-send="true"
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width="193"></span></a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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