<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: arial,helvetica,sans-serif; font-size: 10pt; color: #000000'>*nods* Frontier doesn't make it easy to send them logging information from my side, short of source, destination, time.<div><br></div><div>We do our own LNP and route accordingly. It is pretty simple, though. All of the rate centers off of this tandem have Frontier as an ILEC, so I just pulled all of the NPA-NXXes in those towns and throw them at the tandem. Some of them we do have (I forget the telco speak for this) direct peering with a few of the Frontier switches.</div><div><br></div><div>I have had some cases where a non-ILEC operator was on a different tandem that I would have expected, so I had to carve those out, but the above method has largely held up.</div><div><br></div><div>The first ticket I threw at them, they couldn't even find two out of the three calls, and they just happened within 2 hours of ticket submission.</div><div><br><div><span name="x"></span><br><br>-----<br>Mike Hammett<br>Intelligent Computing Solutions<br>http://www.ics-il.com<br><br><br><br>Midwest Internet Exchange<br>http://www.midwest-ix.com<br><br><span name="x"></span><br></div><br><hr id="zwchr"><div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From: </b>"Mark Timm" <Mark.Timm@aureon.com><br><b>To: </b>"Mike Hammett" <voiceops@ics-il.net>, "Nick Olsen" <Nick@141networks.com><br><b>Cc: </b>"VoiceOps" <voiceops@voiceops.org><br><b>Sent: </b>Monday, October 3, 2022 2:39:18 PM<br><b>Subject: </b>RE: Tandem Dropping Calls<br><br>
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<p class="MsoNormal"><span style="font-family:"Open Sans",sans-serif">If the LERG/OCN doesn’t designate a local tandem there is no local tandem and the call must be sent to the Access tandem or to carrier. If you are performing a LNP query and the LRN does
not subtend Frontier they will not route the call. Generally if you don’t perform a LNP query and the pre-LNP NPA-NXX belongs to in this case, Frontier, Frontier will perform the LNP query, route the call and assess LNP, switching and transport charges to
the originating LEC/you if the number is ported.</span></p>
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<p class="MsoNormal"><span style="font-family:"Open Sans",sans-serif">Sending a log or call record with OPC / DPC and time stamp along with the ticket helps eliminate confusion if you are able to do that.</span></p>
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<p class="MsoNormal"><span style="font-family:"Open Sans",sans-serif">In my experience ISUP 31 does indicate a routing/translation issue.</span></p>
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<p class="MsoNormal"><b>From:</b> VoiceOps <voiceops-bounces@voiceops.org> <b>On Behalf Of
</b>Mike Hammett via VoiceOps<br>
<b>Sent:</b> Monday, October 3, 2022 10:34 AM<br>
<b>To:</b> Nick Olsen <Nick@141networks.com><br>
<b>Cc:</b> VoiceOps <voiceops@voiceops.org><br>
<b>Subject:</b> Re: [VoiceOps] Tandem Dropping Calls</p>
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<p class="MsoNormal" style="text-indent:12.0pt;background:pink"><b><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black">[External Email] This message was sent from outside the company with a URL. Please do not click links unless you recognize
the source of this email and know the content is safe. </span></b><b><span style="font-size:8.0pt;font-family:"Arial",sans-serif"></span></b></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Calls through Bandwidth were successfuls, the last carriers (Frontier and VZW) don't have anything going on with my customer's TN.
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">*sigh* Back to Frontier. I called Friday to escalate, but now the ticket in VFO is closed, so I'm sure that'll be wonderful to get them to act on now.</span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> </span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">It's the same tandem town\CO, but aren't LD tandems and local tandems different, or is that separation history and they just all get
dropped on the same box now?</span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><br>
<br>
-----<br>
Mike Hammett<br>
Intelligent Computing Solutions<br>
<a href="http://www.ics-il.com" target="_blank">http://www.ics-il.com</a><br>
<br>
<br>
<br>
Midwest Internet Exchange<br>
<a href="http://www.midwest-ix.com" target="_blank">http://www.midwest-ix.com</a><br>
<br>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black">From:
</span></b><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black">"Nick Olsen" <<a href="mailto:Nick@141networks.com" target="_blank">Nick@141networks.com</a>><br>
<b>To: </b>"VoiceOps" <<a href="mailto:voiceops@voiceops.org" target="_blank">voiceops@voiceops.org</a>>, "Mike Hammett" <<a href="mailto:voiceops@ics-il.net" target="_blank">voiceops@ics-il.net</a>><br>
<b>Sent: </b>Friday, September 30, 2022 3:30:48 PM<br>
<b>Subject: </b>Re: Tandem Dropping Calls</span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">Honestly the reply you got was more then I would've expected from any ILEC. This lack of care is par for the course for them.</span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"> </span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">The way I read their reply however is "Trouble isn't in my department, go open a ticket elsewhere". And might be indicating that the reject is coming from somewhere further
downstream. Such as they attempted to alert the line but it was busy. And they passed that back to you as a CC31 because... reasons. But this is a routing/translations guy, not an access guy. So he doesn't know.</span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">The ILEC's are so compartmentalized that the person that handled this ticket doesn't even know where you'd go from there other than it's not his/her problem.</span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"> </span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">If I were you, I'd try sending the call to IQ or some other LD carrier and see if you get the same results. Atleast with the Frontier called TN's (2 of the 3), you know
they're terminating back to that same tandem regardless of if it's from you or IQ, or whoever. Try the same call with different ANI's, Different results? Maybe the end user is subscribed to some service that is blocking the call..etc.</span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">Best of luck!</span></p>
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<p class="MsoNormal"><b><span style="color:black">From:</span></b><span style="color:black"> VoiceOps <<a href="mailto:voiceops-bounces@voiceops.org" target="_blank">voiceops-bounces@voiceops.org</a>> on behalf of Mike Hammett via VoiceOps <<a href="mailto:voiceops@voiceops.org" target="_blank">voiceops@voiceops.org</a>><br>
<b>Sent:</b> Friday, September 30, 2022 2:35 PM<br>
<b>To:</b> VoiceOps <<a href="mailto:voiceops@voiceops.org" target="_blank">voiceops@voiceops.org</a>><br>
<b>Subject:</b> [VoiceOps] Tandem Dropping Calls</span><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black">
</span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">We have a new customer that has an increasing number of TNs they can't call. I've traced them all down to going through our local Frontier tandem. Calls from other
phone numbers on our network are fine. Two of the numbers are with Frontier, just another ratecenter off of that tandem. The third we know of goes to VZW.
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> </span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">I submit a ticket to Frontier with source number, destination number, and call date\time for the last set of problem calls, all within the previous 24 hours, out
of our Metaswitch SAS.</span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> </span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Frontier replies:</span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Per Software Engineering/DBA: Did not find mention call in IRIS (SS7), did find at that time a call to 815-824-XXXX, not 815-824-YYYY. SS7 show that call at 14:51
came in on DNC tgn 1011, GN089085, OPC=005-092-136 and terminate to DeKalb switch. Verified</span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">incoming call in switch, switch not blocking terminating to line. **31 - Normal. Unspecified. This cause is used to report a normal event only when no other cause
in the normal class applies**. Found no trouble in switch translations/routing.</span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> </span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Status:</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Cleared Awaiting Cust Verification</span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> </span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">So we have a very different definition of "cleared". I call a problem cleared when it's resolved, not when the reason can't be found.</span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> </span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">So Frontier:</span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">1. Can't find one of the three calls I sent them.</span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">2. Doesn't chase the problem to the end of the line.</span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">3. Clarifies that the ISUP error I'm getting means they don't have a reason for it to be closed, so probably not a normal circumstance.</span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">4. Doesn't investigate why there's an unclassified release.</span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> </span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">How can I incentivize Frontier to actually figure this out?</span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> </span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><br>
<br>
-----<br>
Mike Hammett<br>
Intelligent Computing Solutions<br>
<a href="http://www.ics-il.com" target="_blank">http://www.ics-il.com</a><br>
<br>
<br>
<br>
Midwest Internet Exchange<br>
<a href="http://www.midwest-ix.com" target="_blank">http://www.midwest-ix.com</a><br>
<br>
</span></p>
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