
I thought you had to be on the same tandem to port a number, but with what our tandem operator (Frontier) is telling me, this isn't the case. Comcast ported a number from us in town A. The LRN they pointed to is based in town B (per TelcoData). The tandem generally used by carriers in both towns is based in town B. Naturally, we send traffic to that tandem. The operator of that tandem is telling us that the LRN is actually homed off of a different tandem in our LATA (operated by CenturyLink) in town C. Unfortunately, I can't corroborate this information with TelcoData the only rate center I see off of that tandem in TelcoData is an AT&T town next door. Where can I read up authoritatively on the porting requirements that would apply to this and related bits of info I should know? I'm checking on our LERG access as I know that has the authoritative information, but I don't have that access at the moment. Maybe we're not subscribed to it. Number NPA-NXX in town A: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9... LRN NPA-NXX in town B: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9... Tandem in town B: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DKLBILXA50T Tandem in town C: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DIXNILXA50T Thanks. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com

I drew a picture, hoping it would clear things up a bit. Through my switch, we're trying to call a number in a block assigned to Sycamore, with an LRN in a DeKalb number block, but the common tandem operator is telling me that the LRN actually lives on a different tandem. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com ----- Original Message ----- From: "Mike Hammett" <voiceops at ics-il.net> To: voiceops at voiceops.org Sent: Tuesday, August 28, 2018 4:46:52 PM Subject: [VoiceOps] LNP, tandems, etc. I thought you had to be on the same tandem to port a number, but with what our tandem operator (Frontier) is telling me, this isn't the case. Comcast ported a number from us in town A. The LRN they pointed to is based in town B (per TelcoData). The tandem generally used by carriers in both towns is based in town B. Naturally, we send traffic to that tandem. The operator of that tandem is telling us that the LRN is actually homed off of a different tandem in our LATA (operated by CenturyLink) in town C. Unfortunately, I can't corroborate this information with TelcoData the only rate center I see off of that tandem in TelcoData is an AT&T town next door. Where can I read up authoritatively on the porting requirements that would apply to this and related bits of info I should know? I'm checking on our LERG access as I know that has the authoritative information, but I don't have that access at the moment. Maybe we're not subscribed to it. Number NPA-NXX in town A: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9... LRN NPA-NXX in town B: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9... Tandem in town B: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DKLBILXA50T Tandem in town C: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DIXNILXA50T Thanks. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops

Mike You either need to connect to the other tandem or pay another carrier to get you there. It is the responsibility of the originating carrier to get the call to the terminating carriers switch. Depending on the call volume you should probably just route through your LD carrier On Aug 28, 2018, at 9:15 PM, Mike Hammett <voiceops at ics-il.net<mailto:voiceops at ics-il.net>> wrote: I drew a picture, hoping it would clear things up a bit. Through my switch, we're trying to call a number in a block assigned to Sycamore, with an LRN in a DeKalb number block, but the common tandem operator is telling me that the LRN actually lives on a different tandem. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com ________________________________ From: "Mike Hammett" <voiceops at ics-il.net<mailto:voiceops at ics-il.net>> To: voiceops at voiceops.org<mailto:voiceops at voiceops.org> Sent: Tuesday, August 28, 2018 4:46:52 PM Subject: [VoiceOps] LNP, tandems, etc. I thought you had to be on the same tandem to port a number, but with what our tandem operator (Frontier) is telling me, this isn't the case. Comcast ported a number from us in town A. The LRN they pointed to is based in town B (per TelcoData). The tandem generally used by carriers in both towns is based in town B. Naturally, we send traffic to that tandem. The operator of that tandem is telling us that the LRN is actually homed off of a different tandem in our LATA (operated by CenturyLink) in town C. Unfortunately, I can't corroborate this information with TelcoData the only rate center I see off of that tandem in TelcoData is an AT&T town next door. Where can I read up authoritatively on the porting requirements that would apply to this and related bits of info I should know? I'm checking on our LERG access as I know that has the authoritative information, but I don't have that access at the moment. Maybe we're not subscribed to it. Number NPA-NXX in town A: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9... LRN NPA-NXX in town B: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9... Tandem in town B: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DKLBILXA50T Tandem in town C: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DIXNILXA50T Thanks. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org<mailto:VoiceOps at voiceops.org> https://puck.nether.net/mailman/listinfo/voiceops <LATA 364 Comcast LRN.png> _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org<mailto:VoiceOps at voiceops.org> https://puck.nether.net/mailman/listinfo/voiceops

Okay. I'll take that as my action item. On to the understanding... I don't understand how someone can aribrarily choose which tandem an LRN hangs off of. Why aren't they forced to keep an LRN attached to whatever tandem handles a given incumbent rate center? In my situation, 815-901 is in DeKalb. DeKalb's tandem is... DeKalb. How can Comcast decide to throw it onto Dixon's tandem? I wouldn't have this confusion if Comcast's LRN in Dixon was from an NPA-NXX assigned to Dixon. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com ----- Original Message ----- From: "Matthew Crocker" <matthew at corp.crocker.com> To: "Mike Hammett" <voiceops at ics-il.net> Cc: voiceops at voiceops.org Sent: Tuesday, August 28, 2018 8:53:27 PM Subject: Re: [VoiceOps] LNP, tandems, etc. Mike You either need to connect to the other tandem or pay another carrier to get you there. It is the responsibility of the originating carrier to get the call to the terminating carriers switch. Depending on the call volume you should probably just route through your LD carrier On Aug 28, 2018, at 9:15 PM, Mike Hammett < voiceops at ics-il.net > wrote: I drew a picture, hoping it would clear things up a bit. Through my switch, we're trying to call a number in a block assigned to Sycamore, with an LRN in a DeKalb number block, but the common tandem operator is telling me that the LRN actually lives on a different tandem. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com ----- Original Message ----- From: "Mike Hammett" < voiceops at ics-il.net > To: voiceops at voiceops.org Sent: Tuesday, August 28, 2018 4:46:52 PM Subject: [VoiceOps] LNP, tandems, etc. I thought you had to be on the same tandem to port a number, but with what our tandem operator (Frontier) is telling me, this isn't the case. Comcast ported a number from us in town A. The LRN they pointed to is based in town B (per TelcoData). The tandem generally used by carriers in both towns is based in town B. Naturally, we send traffic to that tandem. The operator of that tandem is telling us that the LRN is actually homed off of a different tandem in our LATA (operated by CenturyLink) in town C. Unfortunately, I can't corroborate this information with TelcoData the only rate center I see off of that tandem in TelcoData is an AT&T town next door. Where can I read up authoritatively on the porting requirements that would apply to this and related bits of info I should know? I'm checking on our LERG access as I know that has the authoritative information, but I don't have that access at the moment. Maybe we're not subscribed to it. Number NPA-NXX in town A: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9... LRN NPA-NXX in town B: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9... Tandem in town B: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DKLBILXA50T Tandem in town C: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DIXNILXA50T Thanks. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops <blockquote> <LATA 364 Comcast LRN.png> </blockquote> <blockquote> _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops </blockquote>

You can pick which rate center your LRN will be assigned from, but you still have to follow the tandem homing established by the ILEC for that rate center. Not all ILECs require the same type of trunking to each of the tandems, but all require you to home your LRN on the tandem that your LRN-NXX would normally be served by in the PSTN network. Now you can appear to get around this by using the CLLI code of a third party providers, but the third party providers network is required to route traffic like the ILEC so really you're just using one pipe to send all your traffic to the ILEC and the third party provider breaks it out according to what tandem the ILEC requires trunking to. Mary Lou Carey BackUP Telecom Consulting Office: 615-771-7868 (temporary) Cell: 615-796-1111 On 2018-08-28 09:56 PM, Mike Hammett wrote:
Okay. I'll take that as my action item. On to the understanding...
I don't understand how someone can aribrarily choose which tandem an LRN hangs off of. Why aren't they forced to keep an LRN attached to whatever tandem handles a given incumbent rate center? In my situation, 815-901 is in DeKalb. DeKalb's tandem is... DeKalb. How can Comcast decide to throw it onto Dixon's tandem? I wouldn't have this confusion if Comcast's LRN in Dixon was from an NPA-NXX assigned to Dixon.
----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com
Midwest Internet Exchange http://www.midwest-ix.com
-------------------------
FROM: "Matthew Crocker" <matthew at corp.crocker.com> TO: "Mike Hammett" <voiceops at ics-il.net> CC: voiceops at voiceops.org SENT: Tuesday, August 28, 2018 8:53:27 PM SUBJECT: Re: [VoiceOps] LNP, tandems, etc.
Mike
You either need to connect to the other tandem or pay another carrier to get you there. It is the responsibility of the originating carrier to get the call to the terminating carriers switch. Depending on the call volume you should probably just route through your LD carrier
On Aug 28, 2018, at 9:15 PM, Mike Hammett <voiceops at ics-il.net> wrote:
I drew a picture, hoping it would clear things up a bit.
Through my switch, we're trying to call a number in a block assigned to Sycamore, with an LRN in a DeKalb number block, but the common tandem operator is telling me that the LRN actually lives on a different tandem.
----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com
Midwest Internet Exchange http://www.midwest-ix.com
-------------------------
FROM: "Mike Hammett" <voiceops at ics-il.net> TO: voiceops at voiceops.org SENT: Tuesday, August 28, 2018 4:46:52 PM SUBJECT: [VoiceOps] LNP, tandems, etc.
I thought you had to be on the same tandem to port a number, but with what our tandem operator (Frontier) is telling me, this isn't the case.
Comcast ported a number from us in town A. The LRN they pointed to is based in town B (per TelcoData). The tandem generally used by carriers in both towns is based in town B. Naturally, we send traffic to that tandem.
The operator of that tandem is telling us that the LRN is actually homed off of a different tandem in our LATA (operated by CenturyLink) in town C. Unfortunately, I can't corroborate this information with TelcoData the only rate center I see off of that tandem in TelcoData is an AT&T town next door.
Where can I read up authoritatively on the porting requirements that would apply to this and related bits of info I should know?
I'm checking on our LERG access as I know that has the authoritative information, but I don't have that access at the moment. Maybe we're not subscribed to it.
Number NPA-NXX in town A:
https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9...
LRN NPA-NXX in town B:
https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9...
Tandem in town B:
https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DKLBILXA50T
[1] Tandem in town C:
https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DIXNILXA50T
Thanks.
----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com
Midwest Internet Exchange http://www.midwest-ix.com
_______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
<LATA 364 Comcast LRN.png>
_______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
Links: ------ [1] https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DKLBILXA50T _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops

I was just about to post that Mary Lou can help you but she beat me to it. Sent from my iPhone
On Aug 29, 2018, at 9:28 AM, BackUP Telecom Consulting <marylou at backuptelecom.com> wrote:
You can pick which rate center your LRN will be assigned from, but you still have to follow the tandem homing established by the ILEC for that rate center. Not all ILECs require the same type of trunking to each of the tandems, but all require you to home your LRN on the tandem that your LRN-NXX would normally be served by in the PSTN network. Now you can appear to get around this by using the CLLI code of a third party providers, but the third party providers network is required to route traffic like the ILEC so really you're just using one pipe to send all your traffic to the ILEC and the third party provider breaks it out according to what tandem the ILEC requires trunking to.
Mary Lou Carey
BackUP Telecom Consulting
Office: 615-771-7868 (temporary)
Cell: 615-796-1111
On 2018-08-28 09:56 PM, Mike Hammett wrote: Okay. I'll take that as my action item. On to the understanding... I don't understand how someone can aribrarily choose which tandem an LRN hangs off of. Why aren't they forced to keep an LRN attached to whatever tandem handles a given incumbent rate center? In my situation, 815-901 is in DeKalb. DeKalb's tandem is... DeKalb. How can Comcast decide to throw it onto Dixon's tandem? I wouldn't have this confusion if Comcast's LRN in Dixon was from an NPA-NXX assigned to Dixon. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com ------------------------- FROM: "Matthew Crocker" <matthew at corp.crocker.com> TO: "Mike Hammett" <voiceops at ics-il.net> CC: voiceops at voiceops.org SENT: Tuesday, August 28, 2018 8:53:27 PM SUBJECT: Re: [VoiceOps] LNP, tandems, etc. Mike You either need to connect to the other tandem or pay another carrier to get you there. It is the responsibility of the originating carrier to get the call to the terminating carriers switch. Depending on the call volume you should probably just route through your LD carrier
On Aug 28, 2018, at 9:15 PM, Mike Hammett <voiceops at ics-il.net> wrote: I drew a picture, hoping it would clear things up a bit. Through my switch, we're trying to call a number in a block assigned to Sycamore, with an LRN in a DeKalb number block, but the common tandem operator is telling me that the LRN actually lives on a different tandem. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com ------------------------- FROM: "Mike Hammett" <voiceops at ics-il.net> TO: voiceops at voiceops.org SENT: Tuesday, August 28, 2018 4:46:52 PM SUBJECT: [VoiceOps] LNP, tandems, etc. I thought you had to be on the same tandem to port a number, but with what our tandem operator (Frontier) is telling me, this isn't the case. Comcast ported a number from us in town A. The LRN they pointed to is based in town B (per TelcoData). The tandem generally used by carriers in both towns is based in town B. Naturally, we send traffic to that tandem. The operator of that tandem is telling us that the LRN is actually homed off of a different tandem in our LATA (operated by CenturyLink) in town C. Unfortunately, I can't corroborate this information with TelcoData the only rate center I see off of that tandem in TelcoData is an AT&T town next door. Where can I read up authoritatively on the porting requirements that would apply to this and related bits of info I should know? I'm checking on our LERG access as I know that has the authoritative information, but I don't have that access at the moment. Maybe we're not subscribed to it. Number NPA-NXX in town A: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9... LRN NPA-NXX in town B: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9... Tandem in town B: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DKLBILXA50T [1] Tandem in town C: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DIXNILXA50T Thanks. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops <LATA 364 Comcast LRN.png> _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops Links:
[1] https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DKLBILXA50T _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops

I reached out to Comcast and pending an increase in installed trunk capacity, they should have the problem fixed by next month. I'd imagine if Frontier installed the new trunks faster than allowed by the tariff, Comcast would have it resolved more quickly. By fixed, I mean Comcast is moving their LRN back to the correct tandem. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com ----- Original Message ----- From: "Mike Hammett" <voiceops at ics-il.net> To: voiceops at voiceops.org Sent: Tuesday, August 28, 2018 4:46:52 PM Subject: [VoiceOps] LNP, tandems, etc. I thought you had to be on the same tandem to port a number, but with what our tandem operator (Frontier) is telling me, this isn't the case. Comcast ported a number from us in town A. The LRN they pointed to is based in town B (per TelcoData). The tandem generally used by carriers in both towns is based in town B. Naturally, we send traffic to that tandem. The operator of that tandem is telling us that the LRN is actually homed off of a different tandem in our LATA (operated by CenturyLink) in town C. Unfortunately, I can't corroborate this information with TelcoData the only rate center I see off of that tandem in TelcoData is an AT&T town next door. Where can I read up authoritatively on the porting requirements that would apply to this and related bits of info I should know? I'm checking on our LERG access as I know that has the authoritative information, but I don't have that access at the moment. Maybe we're not subscribed to it. Number NPA-NXX in town A: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9... LRN NPA-NXX in town B: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9... Tandem in town B: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DKLBILXA50T Tandem in town C: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DIXNILXA50T Thanks. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops

Industry standard for tandem changes is 45 days so everyone can be notified and make the change in their own routing tables. Mary Lou Carey BackUP Telecom Consulting Office: 615-771-7868 (temporary) Cell: 615-796-1111 On 2018-10-04 11:21 AM, Mike Hammett wrote:
I reached out to Comcast and pending an increase in installed trunk capacity, they should have the problem fixed by next month. I'd imagine if Frontier installed the new trunks faster than allowed by the tariff, Comcast would have it resolved more quickly.
By fixed, I mean Comcast is moving their LRN back to the correct tandem.
----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com
Midwest Internet Exchange http://www.midwest-ix.com
-------------------------
FROM: "Mike Hammett" <voiceops at ics-il.net> TO: voiceops at voiceops.org SENT: Tuesday, August 28, 2018 4:46:52 PM SUBJECT: [VoiceOps] LNP, tandems, etc.
I thought you had to be on the same tandem to port a number, but with what our tandem operator (Frontier) is telling me, this isn't the case.
Comcast ported a number from us in town A. The LRN they pointed to is based in town B (per TelcoData). The tandem generally used by carriers in both towns is based in town B. Naturally, we send traffic to that tandem.
The operator of that tandem is telling us that the LRN is actually homed off of a different tandem in our LATA (operated by CenturyLink) in town C. Unfortunately, I can't corroborate this information with TelcoData the only rate center I see off of that tandem in TelcoData is an AT&T town next door.
Where can I read up authoritatively on the porting requirements that would apply to this and related bits of info I should know?
I'm checking on our LERG access as I know that has the authoritative information, but I don't have that access at the moment. Maybe we're not subscribed to it.
Number NPA-NXX in town A: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9... LRN NPA-NXX in town B: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=9... Tandem in town B: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DKLBILXA50T Tandem in town C: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DIXNILXA50T
Thanks.
----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com
Midwest Internet Exchange http://www.midwest-ix.com
_______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
participants (4)
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avorlando@yahoo.com
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marylou@backuptelecom.com
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matthew@corp.crocker.com
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voiceops@ics-il.net