<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* In my area, different companies operate the two tandems, so then I need a third party to get there. That makes it fun. :-)<br><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>"Mary Lou Carey" <marylou@backuptelecom.com><br><b>To: </b>"Mike Hammett" <voiceops@ics-il.net><br><b>Cc: </b>"VoiceOps" <voiceops@voiceops.org><br><b>Sent: </b>Tuesday, June 15, 2021 11:04:28 AM<br><b>Subject: </b>Re: [VoiceOps] Multiple Tandems Per LATA<br><br>It depends on who the ILEC is and whether you're interconnected via your <br>own SS7 trunks or not. In BellSouth territory you can order a <br>multi-tandem super group to cover all the tandems in the LATA. You just <br>pay a per-MOU charge to have them deliver the traffic to the other <br>tandems. Its not worth it if you have to send a lot of traffic though. <br>In the Verizon and other AT&T areas they make you order trunks to every <br>tandem so you don't have a choice. In the old CenturyLink areas you <br>could send traffic through your Access Tandem group as long as you had <br>SPOP in your ICA.<br><br>Your other option is to "lease your PSTN connection" through a third <br>party provider like Inteliquent, Peerless, or Wide Voice that have SS7 <br>trunks connected to every tandem in that LATA. It eliminates your need <br>for SS7 links but you do pay a per MOU for every call.<br><br>MARY LOU CAREY<br>BackUP Telecom Consulting<br>Office: 615-791-9969<br>Cell: 615-796-1111<br><br>On 2021-06-10 04:28 PM, Mike Hammett wrote:<br>> When your service area is taken care of by one tandem in the LATA, do<br>> you connect to the other tandems in your LATA?<br>> <br>> Currently I just send anything that's not on my single tandem (or my<br>> direct connections) to my interLATA termination. How common is that?<br>> It's pricey to build out to the other tandem.<br>> <br>> -----<br>> Mike Hammett<br>> Intelligent Computing Solutions<br>> http://www.ics-il.com<br>> <br>> Midwest Internet Exchange<br>> http://www.midwest-ix.com<br>> _______________________________________________<br>> VoiceOps mailing list<br>> VoiceOps@voiceops.org<br>> https://puck.nether.net/mailman/listinfo/voiceops<br></div><br></div></body></html>