On Thu, 24 Dec 2015 19:52:57 -0000 (UTC), John McCoy
UVerse is fiber to the house, at least here. They said they were
"investigating" copper from curb to house technology but they weren't
offering it. It was either fiber to the house or nothing. It took
them a while for it to sink in that we had fiber in our front yard, so
connecting us wasn't a huge deal (we've had UVerse for a couple of
While digital signals do in fact travel over analog paths (there is no other
kind), this does not mean that there is no distinction between digital
signals and analog signals.
A good analogy is a photograph (from the days of silver-based film):
Every time a photo of say a landscape is copied, it gets blurrier, and
information (sharpness in this case) is forever lost.
However, it the photo is of for instance a page of text, there is no loss of
information (the text) so long as the accumulated blurring is not so severe
that one cannot make the letters out. If one retypes the text before the
blurring has gone too far, there is no loss - the text is perfectly
regenerated. This regeneration process can be repeated any number of times
This is the core difference between digital signals and analog signals.
...as long as... That's true of the silver photograph, too. As long
as the tree looks like a tree, it still looks like a tree. IOW, you
have *loads* of redundant information. That doesn't make it "digital"
It's all odds. If you recreate information before it's lost, it's not
lost. That's not the difference between "analog" and "digital", at
least not one used by anyone I know.
Digital is 1's and 0's. Analog is everything in between. You know,
like the difference between an analog computer and a digital computer?
OK, let me ask you the question I posed a day or so ago: Were V.90 or
V.92 modems (over POTS lines, of course) digital or analog? If you
consider them to be analog, in what material way do they differ from
DSL? If you consider them to be digital, name me one other person who
believes this. ;-)
Oh, to answer your question, in this area the words "analog" and
"digital" have become next to meaningless. Everything is analog
(there are A/D and D/A converters at both ends, with the As in the
middle, on the wire side - leaning the definition of the communication
protocol considerably to the 'A' side, IMO).
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