[124198] in North American Network Operators' Group
Re: "Is TDM going the way of dial-up?"
daemon@ATHENA.MIT.EDU (Frank A. Coluccio)
Fri Mar 26 12:12:23 2010
Date: Fri, 26 Mar 2010 09:10:37 -0700
From: "Frank A. Coluccio" <frank@fttx.org>
To: "Michael Thomas" <mike@mtcc.com>
Cc: nanog@nanog.org
Reply-To: frank@fttx.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
re: "what is the state of voip-over-cellular as essentially the last
holdout
of TDM? Will the new 4G stuff be able to support latencies, etc? Has
the
work on handovers-over-IP matured enough that it's viable?"
One of the biggest hurdles in bringing Ethernet to mobile/cellular apps
has been its lack of synchronous capabilities. This is now being
overcome
in a variety of ways, both IETF-instigated and at IEEE, and through
some
proprietary solutions where vendors are re-introducing system clocking.
See
my footer note <fac:> that addresses this subject at the bottom of
[1]this message.
--- mike@mtcc.com wrote:
From: Michael Thomas <mike@mtcc.com>
To: Steve Meuse <smeuse@mara.org>
Cc: nanog@nanog.org
Subject: Re: "Is TDM going the way of dial-up?"
Date: Fri, 26 Mar 2010 08:33:38 -0700
On 03/26/2010 08:26 AM, Steve Meuse wrote:
> Rick Ernst expunged (nanog@shreddedmail.com):
>
>> I'm wondering if others are seeing the same behavior, if it's
>> market-dependant, or if I'm just imagining things. I'm working on
building
>> new infrastructure and my current thoughts are to minimize my TDM
>> footprint. It would be useful to get a better feel if this is an
overall
>> trend or something local.
>
> You aren't imagining things. In fact, some large national networks
have been designed to support solely ethernet. It comes down to cost,
as always....
Speaking of which, what is the state of voip-over-cellular as
essentially the
last holdout of TDM? Will the new 4G stuff be able to support
latencies, etc?
Has the work on handovers-over-IP matured enough that it's viable?
Mike
References
1. http://siliconinvestor.advfn.com/readmsg.aspx?msgid=26408512
