🚀 go-pugleaf

On Tue, 14 Aug 2007 20:16:33 -0700, "nobody >"
<invalid@email.death.by.spam> wrote:

>kony wrote:
>> On Mon, 13 Aug 2007 23:33:12 -0000, Radium
>> <glucegen1@gmail.com> wrote:
>> 
>> 
>>> My question was can Quadrature Modulation and Constellation Modulation
>>> allow analog dial-up modems to have the same speed as cable modems?
>>> Not any kind of DSL, just analog.
>>>
>>> Can the analog phone line make use of the above two modulations
>>> schemes to achieve cable-modem speeds at the voiceband frequencies
>>> used by the analog dial-up modem?
>> 
>> The answer is no, it can't.  Plain old twisted pair bell
>> wire cannot retain the analog signal at the sufficiently
>> high frequencies necessary to come anywhere near ISDN, ADSL,
>> let alone *cable* broadband speeds.
>
>That's funny.. I'd swear that it's plain old twisted pair bell wire that 
>runs about 6,500 feet from the remote DSLAM to my house. 

Reread what I wrote.  _Analog_ signal.  I think we're all
well aware that ADSL uses telephone wire, and we're also
aware it can't meet cable broadband speed which was one of
the stipulations.

>I wonder why 
>I'm getting 2900/670 down/up. Must be that fancy CAT5 cable that runs 
>between my computer and the modem that does it. (I always use an 
>external modem)
>
>Reality is that you can push Gigabit down a two-strand barbed-wire fence 
>if you have the bucks to spend on the equipment at the ends.

A nice idea but no, you can't.  The SNR drops so low there
would be insufficient differentiation to reach high speeds,
no matter how good the equipment.  Maybe if you meant a few
inches of wire instead of a telephone line length run, but I
don't see many people stringing only a few inches of barbed
wire as it wouldn't make for much of a "fence".

I don't ask you to agree though, show anyone doing it,
pushing a cable broadband speed signal reliably down a steel
barbed wire run long enough to connect your modem to a
DSLAM.  Considering even your TP copper wire can't, unless a
device is specifically made to do this you have no
reasonable expectation it can be done, nor that anyone would
ever even try to create such a device for "barbed wire
broadband".

>
>> 
>> If you had bothered to do some research you would know this.
>> 
>> I recommmend you do some basic, prerequisite learning of
>> basic core technologies before trying to bite off more than
>> you can chew.  The building blocks of education are not
>> trying to invent some new thing when you don't even know how
>> the old things worked.
>
>If you are trying to smarten up poor Radium, you'd better take your own 
>advice.

Start by reading more carefully.   People don't generally
write things without reason (except of course Radium).