I am an AOCN and have real time access to the LERG so just out of
curiosity and because I like mysteries, I looked up your example to see
what you were talking about. Comcast's records in LATA 364 are a mess!
Most of Comcast's NXXs were assigned back in 11/07/13. When it was
originally added, Comcast had it homed on the DKLBILXA50T tandem, which
is correct. Then in February 2016 someone made a SHA change to their
switch record and changed the tandem to DIXNILXA50T for the Local and
IntraLATA tandems and CHCGILWU24T for the FGD Tandem. My guess is that
Comcast initially set it up correctly, but when they added the
CenturyLink territory of the LATA, they didn't add a second switch
homing arrangement and LRN for the CenturyLink territory like they
should have. I can't explain why it works unless there just haven't been
any new companies since 2016. I would call Frontier back and tell them
that they must have trunks established with Comcast because they have a
bunch of NXXs in their territory that were set up in November 2013.
Mary Lou Carey
BackUP Telecom Consulting
Office: 615-771-7868 (temporary)
Cell: 615-796-1111
On 2018-08-28 06:00 PM, Mike Hammett wrote:
Meaning if I thought were true? I had just assumed that Inteliquent
did have the connections to every tandem in the LATAs they serve,
given that (my thought) that you could only port numbers on the same
tandem, so universal coverage would require connections to every
tandem. We're actually looking at someone like Inteliquent to expand
our footprint.
So I'm supposed to be connected to every tandem in my LATA? In my
LATA, there are only two (I believe), but some LATAs (like Chicago)
have several. I'm supposed to drag a DS1 (or use Inteliquent, etc. if
available) to connect to each one, even if I don't provide service in
the rate centers traditionally served by that tandem? It seems like
Comcast threw a dart at a dart board in choosing which tandem to
connect to vs. going with the one that everyone else in that town
uses.
So then I could port a number from any rate center in my LATA (say
Savanna) and point it to my LRN, living off of a tandem switch that
the Savanna ILEC isn't connected to (from my outside world
perspective)? Is there even the LATA constraint? Given the porting
limitations I had experienced in the VoIP world, I assumed it was a
tandem-by-tandem basis.
So the LERG shows which tandem I need to send traffic to if I want to
talk to them, but they could send their outbound calls to a different
tandem? My current customer complaint is for calls that we're sending
to Comcast, apparently homed off of the other tandem.
If everyone is supposed to be on every tandem, then why can't the
tandem I'm on just accept the calls I'm sending to Comcast, since
Comcast should be there? Obviously me not being on the other tandem
would affect inbound traffic to me.
Is there another service I should be paying Frontier for to get me to
the other tandem with some value-add service? I know CenturyLink hops
through almost every town going that way (former LightCore and others
before route). Frontier or CenturyLink may be able to get me a DS1 to
the other tandem if I need that.
I'm aware that I could still be completely missing the mark.
BTW: Thanks for TelcoData. I subscribed a long time ago, but haven't
for many ages.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
Midwest Internet Exchange
http://www.midwest-ix.com
-------------------------
FROM: "Paul Timmins" <[email protected]>
TO: "Mike Hammett" <[email protected]>
CC: [email protected]
SENT: Tuesday, August 28, 2018 5:19:11 PM
SUBJECT: Re: [VoiceOps] LNP, tandems, etc.
If that were true, you wouldn't be able to use inteliquent (et al) as
your access tandem. Everyone is supposed to be directly or indirectly
connected to every tandem in the LATA (which you can't independently
verify, as telcodata and the LERG both show terminating tandem
information to reach that end office, not what tandems the end office
is hooked to to terminate calls.
On Aug 28, 2018 17:47, Mike Hammett <[email protected]> wrote:
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
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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