It's true that in the metropolitan areas the ILECs will allow you to
trunk everything to the tandem, but the routing for rural areas is
handled totally different in some ILEC areas. The old CenturyLink used
to force carriers in some rural areas to deliver to the end office if
the office associated with the rate center because it was so far out
that the office had no local tandem. Others like the old Qwest
territories let you route all traffic from the switches that had no
local tandem over the Access Tandem if you had SPOP (Single Point of
Presence) language in your agreement. The old BellSouth areas let you
establish one Multi-tandem supergroup for the entire ILEC area and just
charged you minutes of use anytime they had to inter-tandem a call.
Every ILEC territory is just a little different, but they all share
commonalities that they require you to route the LRN NXX to the tandem
(or EO if there is no local tandem) that it is served by.
Mary Lou Carey
BackUP Telecom Consulting
Office: 615-771-7868 (temporary)
Cell: 615-796-1111
On 2018-08-28 07:25 PM, Erik wrote:
Most providers simply connect to the tandem at the ILEC. The end
office transit termination and origination cost is SO LOW that it
doesn't make since to have a switch or access point at the end office.
Since most things are ILEC if not all are VOIP everything is coming
from a centralize switch point. Hopefully all the 1970's billing
methods will disappear.
On Tue, Aug 28, 2018 at 1:00 PM, Mike Hammett <[email protected]>
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
[1]
LRN NPA-NXX in town B:
https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=901
[2]
Tandem in town B:
https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DKLBILXA50T
[3]
Tandem in town C:
https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DIXNILXA50T
[4]
Thanks.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
Midwest Internet Exchange
http://www.midwest-ix.com
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Links:
------
[1]
https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=991
[2]
https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=901
[3]
https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DKLBILXA50T
[4]
https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DIXNILXA50T
[5] https://puck.nether.net/mailman/listinfo/voiceops
_______________________________________________
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