[VoiceOps] New Exchange 217/777

Paul Timmins paul at timmins.net
Tue Jul 15 13:29:39 EDT 2014

What's worse really is not that you have to look at ILEC tandems out of 
area - they don't perform any route filtering, if the originating caller 
is calling out of area, it gets sent to their PIC/LPIC LD carrier.

So what you really need is every IXC in the country to make sure they 
have a route to you either directly, through whatever tandem homing 
arrangements you have, or via another IXC (really common especially in 
rural areas to see a Level 3/Global Crossing hand off to 
Qwest/AT&T/Verizon for the final termination.).


On 07/15/2014 10:52 AM, Adam Vocks wrote:
> So, at the very least, I need to start looking at each of the ILEC's
> tandems in a specific LATA?
> Adam
> -----Original Message-----
> From: VoiceOps [mailto:voiceops-bounces at voiceops.org] On Behalf Of Alex
> Balashov
> Sent: Tuesday, July 15, 2014 9:48 AM
> To: voiceops at voiceops.org
> Subject: Re: [VoiceOps] New Exchange 217/777
> On 07/15/2014 10:44 AM, Adam Vocks wrote:
>> :-)
>> Take Kidd's call from Verizon in Colorado.  If there isn't our
>> exchange in their local switch, do they forward the call on to another
>> switch in hopes that it will know where to send it?  Similar to a
>> default gateway in IP world?
> It would get kicked up to an ILEC tandem inside that LATA. There is
> really no default gateway beyond that; at that point, you've already
> exited into what the IP world would call "default route-free" or "Tier
> 1" routing space.
> --
> Alex Balashov - Principal
> Evariste Systems LLC
> Tel: +1-678-954-0670
> Web: http://www.evaristesys.com/, http://www.alexbalashov.com/
> Please be kind to the English language:
> http://www.entrepreneur.com/article/232906
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