🚀 go-pugleaf

NO! just use DSL it's cheaper, better, and faster, why re-invent the wheel.


-- 

Newsgroup Trolls. Read about mine here http://www.pcbutts1.com/downloads
The list grows. Leythos the stalker http://www.leythosthestalker.com, David 
H. Lipman, Max M Wachtell III  aka What's in a Name?, Fitz,
Rhonda Lea Kirk, Meat Plow, F Kwatu F, George Orwell



"Radium" <glucegen1@gmail.com> wrote in message 
news:1187047992.660981.318810@x35g2000prf.googlegroups.com...
> On Aug 13, 4:27 pm, Radium <gluceg...@gmail.com> wrote:
>> On Aug 13, 4:21 pm, "Vanguard" <vangu...@mail.invalid> wrote:
>>
>>
>>
>> > "Radium" <gluceg...@gmail.com> wrote in message
>>
>> >news:1187045374.227004.161110@g12g2000prg.googlegroups.com...
>>
>> > > Hi:
>>
>> > > Quotes from
>> > >http://groups.google.com/group/sci.electronics.basics/msg/0c013cf5371...
>> > > :
>>
>> > >>Multiple-level quadrature modulation,
>> > >>"constellation modulation",
>> > >>is most common for packing
>> > >>lots of bits per Hz of bandwidth.
>> > >>The more you pack,
>> > >>the better the s/n ratio has to be.
>>
>> > >>http://en.wikipedia.org/wiki/Quadrature_amplitude_modulation
>>
>> > >>http://en.wikipedia.org/wiki/Constellation_diagram
>>
>> > > Does this mean that Quadrature Modulation and Constellation
>> > > Modulation
>> > > can be used -- at least in theory -- to give dial-up modem
>> > > connections
>> > > around the same fast speeds provided by Broadband cable modems?
>>
>> > It's called aDSL.  Uses the same phone line as your analog modem.  Go
>> > search on Wikipedia or Google for info.
>>
>> Does ADSL also make the sounds associated with the dial-up modem --
>> i.e. the sounds that result as a computer connects to the net via its
>> dial-up modem?
>
> OOPS! I forget that those sounds only occur on analog modem. ADSL is
> obviously digital.
>
> 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?
>