[192822] in North American Network Operators' Group
Re: Voice channels (FTTH, DOCSIS, VoLTE)
daemon@ATHENA.MIT.EDU (Jay R. Ashworth)
Sun Nov 27 21:48:07 2016
X-Original-To: nanog@nanog.org
Date: Mon, 28 Nov 2016 02:47:17 +0000 (UTC)
From: "Jay R. Ashworth" <jra@baylink.com>
To: North American Network Operators' Group <nanog@nanog.org>
In-Reply-To: <alpine.DEB.2.02.1611210850360.3558@uplift.swm.pp.se>
Errors-To: nanog-bounces@nanog.org
----- Original Message -----
> From: "Mikael Abrahamsson" <swmike@swm.pp.se>
> To: "Jean-Francois Mezei" <jfmezei_nanog@vaxination.ca>
> Cc: Nanog@nanog.org
> Sent: Monday, November 21, 2016 2:53:41 AM
> Subject: Re: Voice channels (FTTH, DOCSIS, VoLTE)
> On Mon, 21 Nov 2016, Jean-Francois Mezei wrote:
>
>> I need to verify some claims made by incumbents in Canada that VoLTE
>> data travels on a totally separate channel between the phone and the
>> antenna.
>
> Typically it travels on another "bearer" compared to Internet traffic.
>
> http://blog.3g4g.co.uk/2013/08/volte-bearers.html
>
> Think of bearers as "tunnels" between the mobile core network and the
> device. They have a lot in common with ATM PVCs in that they can have
> different QoS characteristics. So the VoLTE bearer can have scheduling
> priorities that means it'll always be low-latency and highest priority,
> meaning it might work well when the "Internet" bearer does not.
That is congruent with my understanding of how cableco voice is provisioned;
it has different rules WRT VoN -- specifically about 911 -- because the cable
company segregates it and handles it differently (your cablemodem is expected
to be tied to your service address -- or whatever terminal device does the
voice).
Cheers,
-- jra
--
Jay R. Ashworth Baylink jra@baylink.com
Designer The Things I Think RFC 2100
Ashworth & Associates http://www.bcp38.info 2000 Land Rover DII
St Petersburg FL USA BCP38: Ask For It By Name! +1 727 647 1274
