[VoiceOps] LNP, tandems, etc.

[BackUP Telecom Consulting]

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=991
>> 
>> LRN NPA-NXX in town B:
>> 
> https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=901
>> 
>> 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
>> 
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> 
>> <LATA 364 Comcast LRN.png>
> 
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> 
> 
> 
> Links:
> ------
> [1] 
> https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DKLBILXA50T
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