ASDL is analogue technology

Anyone got a problem with that?


Graham.



%Profound_observation%

"Graham" <(E-Mail Removed)> wrote in message
news:40b8b188$(E-Mail Removed)...
> Anyone got a problem with that?
>
Yeah me ya prat.
It's ADSL not ASDL and if you can't get that bit right what hope is there
for the rest of it.

% = 0


--
·.¸¸.·´¯`Underground Zero´¯`·.¸¸.·

" OFM#20 - Going, Going, G....... Yeah you wish"

"·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸ .·´¯
OH SIHT!
"·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸ .·´¯

"Graham" <(E-Mail Removed)> wrote in message
news:40b8b188$(E-Mail Removed)
> Anyone got a problem with that?

Yes.

If ADSL is analogue then so is DAB radio and Digital television because
the same thing is happening - a digital signal is being encoded for
transmission over an analogue medium.

i.e. ADSL isn't analogue by the normal definition of analogue.

--

Brian Gregory (In the UK).
(E-Mail Removed)
To email me remove the letter vee.

"Graham" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> "·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸ .·´¯
> OH SIHT!
> "·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸.·´¯"·.¸¸ .·´¯
>
Oh On


--
·.¸¸.·´¯`Underground Zero´¯`·.¸¸.·

" OFM#20 - Going, Going, G....... Yeah you wish"

On Sat, 29 May 2004 18:33:16 +0100, in article
<40b8c960$0$25317$(E-Mail Removed)> "Brian Gregory [UK]"
<(E-Mail Removed)> wrote:

> "Graham" <(E-Mail Removed)> wrote in message
> news:40b8b188$(E-Mail Removed)
>> Anyone got a problem with that?
>
> Yes.
>
> If ADSL is analogue then so is DAB radio and Digital television because
> the same thing is happening - a digital signal is being encoded for
> transmission over an analogue medium.
>
> i.e. ADSL isn't analogue by the normal definition of analogue.

At the physical level everything is analogue until you get down to quantum
effects. And there may well be some debate about those too....

--

Brian Morrison

please observe reply-to address

In article <40b8c960$0$25317$(E-Mail Removed)>, Brian
Gregory [UK] said......


>
> i.e. ADSL isn't analogue by the normal definition of analogue.
>
>
Oh goody! This looks as though it could turn into an "Is 128k ADSL
really broadband" type threads
--
Mugwump

Reply to 'usenetmail{at}discworld{dot}org{dot}uk

"Brian Gregory [UK]" <(E-Mail Removed)> wrote in message
news:40b8c960$0$25317$(E-Mail Removed)...
> "Graham" <(E-Mail Removed)> wrote in message
> news:40b8b188$(E-Mail Removed)
> > Anyone got a problem with that?
>
> Yes.
>
> If ADSL is analogue then so is DAB radio and Digital television because
> the same thing is happening - a digital signal is being encoded for
> transmission over an analogue medium.
>
> i.e. ADSL isn't analogue by the normal definition of analogue.
>
> --
>
> Brian Gregory (In the UK).
> (E-Mail Removed)
> To email me remove the letter vee.
>


That's my point.

So let me put it another way.
Why is a V90 modem thought of as analogue, and an ADSL modem as digital?

In message <(E-Mail Removed)>, Graham
<(E-Mail Removed)> writes
>
>"Brian Gregory [UK]" <(E-Mail Removed)> wrote in message
>news:40b8c960$0$25317$(E-Mail Removed)...
>> "Graham" <(E-Mail Removed)> wrote in message
>> news:40b8b188$(E-Mail Removed)
>> > Anyone got a problem with that?
>>
>> Yes.
>>
>> If ADSL is analogue then so is DAB radio and Digital television because
>> the same thing is happening - a digital signal is being encoded for
>> transmission over an analogue medium.
>>
>> i.e. ADSL isn't analogue by the normal definition of analogue.
>>
>> --
>>
>> Brian Gregory (In the UK).
>> (E-Mail Removed)
>> To email me remove the letter vee.
>>
>
>
>That's my point.
>
>So let me put it another way.
>Why is a V90 modem thought of as analogue, and an ADSL modem as digital?
>
>
>
For ADSL the telecommunications network (aka BT) transfers the digital
bit stream from one end to the other as a digital bit stream -
regenerating the signals at the digital level as necessary.
For a V90 Modem the network transfers analogue tones generated by the
modem from the bit stream. It does digitise the tones for its own
purposes, but that digital bit stream bears only a limited relationship
to the originating bit stream because of the modems frequency encoding,
and is reversed before delivery - it is the responsibility of the
receiver to transform the analogue tones back into a digital bit stream.


--
Peter R Cook

"Peter R Cook" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> In message <(E-Mail Removed)>, Graham
> <(E-Mail Removed)> writes
> >
> >"Brian Gregory [UK]" <(E-Mail Removed)> wrote in message
> >news:40b8c960$0$25317$(E-Mail Removed)...
> >> "Graham" <(E-Mail Removed)> wrote in message
> >> news:40b8b188$(E-Mail Removed)
> >> > Anyone got a problem with that?
> >>
> >> Yes.
> >>
> >> If ADSL is analogue then so is DAB radio and Digital television because
> >> the same thing is happening - a digital signal is being encoded for
> >> transmission over an analogue medium.
> >>
> >> i.e. ADSL isn't analogue by the normal definition of analogue.
> >>
> >> --
> >>
> >> Brian Gregory (In the UK).
> >> (E-Mail Removed)
> >> To email me remove the letter vee.
> >>
> >
> >
> >That's my point.
> >
> >So let me put it another way.
> >Why is a V90 modem thought of as analogue, and an ADSL modem as digital?
> >
> >
> >
> For ADSL the telecommunications network (aka BT) transfers the digital
> bit stream from one end to the other as a digital bit stream -
> regenerating the signals at the digital level as necessary.
> For a V90 Modem the network transfers analogue tones generated by the
> modem from the bit stream. It does digitise the tones for its own
> purposes, but that digital bit stream bears only a limited relationship
> to the originating bit stream because of the modems frequency encoding,
> and is reversed before delivery - it is the responsibility of the
> receiver to transform the analogue tones back into a digital bit stream.
>
>
> --
> Peter R Cook

56k modems use quadrature amplitude modulation of audable (albeit not very
musical) tones

ADSL uses DMT (Discrete Multitone) modulation. The "tones" being radio
frequency carriers.
So what are you saying? If its audio its analogue & if its RF its digital?


Graham.


%Profound_observation%