Volume 29 : Issue 6 : "text" Format
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Re: AT&T asking FCC for "end date" of switched network...
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Date: Tue, 5 Jan 2010 22:01:37 -0600 (CST)
From: Robert Bonomi <email@example.com>
Subject: Re: AT&T asking FCC for "end date" of switched network...
In article <firstname.lastname@example.org>,
> On Jan 4, 12:31 am, "Paul Hoffman" <prhkgh.remove-t...@and-this-
> too.comcast.net> wrote:
>> Recently AT&T asked the FCC to set a date to transition completely
>> off traditional "switched technology" telephone networking, in favor
>> of packet switched (internet-style) networking. [AT&T claimed that]
>> maintaining two parallel networks that accomplish essentially the
>> same thing was wasteful and uneconomical, and this has caused quite
>> a bit of posts, especially between collectors and users of 'old
>> telephone technology' such as me.
>> At the time I read about AT&T's request I did not realize the
>> petition was for the technology in and between central offices, and
>> not a bid to remove all copper twisted pair out to consumer's
>> premises. However with the ever-increasing amount of fiber either
>> to premises or to centralized communication near the end users, my
>> [concerns] remain the same.
> Where does Verizon fit in all of this? Isn't today's at&t a
> relatively small company?
Current assets $265 Billion
2008 gross revenues $124 *Billion*.
(operating expenses $100 Billion)
2008 gross profit (revenues less expenses) $24 Billion
Doesn't sound like a 'small' company to me.
Others may have a different opinion.
> There are several issues in play here, some transparent to the home
> subscriber, some possibly of import.
> networks being a pain is correct. It's digital signals using a
> protocol. When we make a telephone call, we do not get dedicated use
> of a given digital line between two points.
False to fact.
One does get dedicated use of a given digital 'circuit' between the two
points. This is what the 'connection set-up' when a call is placed establishes
It may well be time-division-multiplexed (e.g. a DS-0 in a DS-1) on a common
physical connection, but the full capacity of that circuit IS dedicated
for your use, regardless of how much, or how little, use you actually make
of it during the call. That connection is _yours_, for your exclusive use,
until the 'connection tear-down' at the end of the call.
This is why the telco backbone is referenced as a 'circuit-switched'
architecture, not a 'packet-switched' one.
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