[VoiceOps] Conferencing NPAs

Scott Berkman scott at sberkman.net
Wed Dec 9 13:12:10 EST 2009

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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