[VoiceOps] Conferencing NPAs

Carlos Alcantar carlos at race.com
Wed Dec 9 19:18:46 EST 2009

I'm sure the FCC would love to hear that.

Carlos Alcantar
Race Telecommunications, Inc.
101 Haskins Way
South San Francisco, CA 94080
P: 650.649.3550
F: 650.649.3551

-----Original Message-----
From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org] On Behalf Of Ujjval Karihaloo
Sent: Wednesday, December 09, 2009 10:14 AM
To: Scott Berkman; 'Alex Balashov'
Cc: voiceops at voiceops.org
Subject: Re: [VoiceOps] Conferencing NPAs

Level 3 just told me that we need to start blocking these NPA-NXX's...and that they have a lot of trouble with them..no specific explaination.

Ujjval Karihaloo
VP Voice Engineering
IP Phone: +13032428610
E-Fax: +17202391690

SimpleSignal Inc.
88 Inverness Circle East
Suite K105
Englewood, CO  80112

-----Original Message-----
From: Scott Berkman [mailto:scott at sberkman.net] 
Sent: Wednesday, December 09, 2009 11:12 AM
To: 'Alex Balashov'
Cc: Ujjval Karihaloo; voiceops at voiceops.org
Subject: RE: [VoiceOps] Conferencing NPAs

I don't have that level of knowledge of their network, but I can easily
believe they'd only have tandem trunking in some of these rural places.


-----Original Message-----
From: Alex Balashov [mailto:abalashov at evaristesys.com] 
Sent: Tuesday, December 08, 2009 7:03 PM
To: Scott Berkman
Cc: 'Ujjval Karihaloo'; voiceops at voiceops.org
Subject: Re: [VoiceOps] Conferencing NPAs

Scott Berkman wrote:

> Yes, number of Tandem trunks and/or PRIs.
> 	Remember that Level 3's voice service was born out of their managed
> modem service.  As the modem business (especially that of their really
> wholesale customers) started declining, that capacity was converted to (or
> shared with) IP media gateways.  Therefore areas that didn't have a large
> capacity in the modem world didn't have a large capacity for calls.

Yes, that I know, but my understanding was that this applies to 
origination.  That is why they have direct end-office trunks to nearly 

How does the termination architecture work?  I would assume it's like 
any other large CLEC and/or IXC:  by default, they connect to a POI 
and have tandem groups from there, and also ride their own network to 
select end-offices in which colocate equipment for the purpose of 
generating UNEs, when/if there is switching equipment there.

Alex Balashov - Principal
Evariste Systems
Web     : http://www.evaristesys.com/
Tel     : (+1) (678) 954-0670
Direct  : (+1) (678) 954-0671

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