[VoiceOps] Definition: Local Calls

Mary Lou Carey marylou at backuptelecom.com
Thu Dec 10 12:53:09 EST 2020

That's a good point. It depends on whether you're in a metropolitan area 
or a very rural area where there's no local tandem. In most LATAs where 
AT&T and Verizon are the main ILEC, the small ILECs will use the ILEC 
tandem to pick up traffic. But there are a lot of the rural areas 
(especially in the old Qwest territory) where the larger towns are so 
much farther apart that they didn't put in local tandems. So you had to 
trunk everything directly to the end office or through an access tandem 
if you had SPOP. If the small ILECs had multiple end offices, they might 
have even put in their own tandem for just their area.

So you definitely need to check out the routing information in the LERG 
before you make any assumptions about what rate centers are encompassed 
in a tandem area.

BackUP Telecom Consulting
Office: 615-791-9969
Cell: 615-796-1111

On 2020-12-09 10:25 AM, John Levine wrote:
> In article
> <1038462169.17163.1607448901620.JavaMail.mhammett at Thunderfuck2> you
> write:
>> My operating theory is that if it's on the same tandem switch, I might 
>> as well treat it as local.
> If only. At my rural ILEC, the next town up is a remote from the
> switch in my town but for historical reasons they are not local to
> each other so at least for people who haven't switched to bundled
> plans, calls between them take a 150 mile detour to the tandem and
> back.
> That particular tandem also covers places 250 miles from here. I guess
> it's nice if that's local.
> R's,
> John
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