line is now adsl how does phone work?

Hi,
correct me if I am wrong:
When we had to dial-up to the internet we had a modem which converted the
incoming analogue phone signal into the required digital stream. It
converted the outbound digital signal to analogue. The telephones worked
with the analogue signal.

Now we have an ADSL line... incoming signals are already digital ... we have
a splitter of course to split off the signal to the phone .. is this still
analogue? Are we receiving analogue AND digital signals?
cheers
cow

code_wrong wrote:
> Hi,
> correct me if I am wrong:
> When we had to dial-up to the internet we had a modem which converted
> the incoming analogue phone signal into the required digital stream.
> It converted the outbound digital signal to analogue. The telephones
> worked with the analogue signal.
>
> Now we have an ADSL line... incoming signals are already digital ...
> we have a splitter of course to split off the signal to the phone ..
> is this still analogue? Are we receiving analogue AND digital signals?
> cheers
> cow

Yes...

On Mon, 14 Nov 2005 19:41:36 UTC, "code_wrong" <(E-Mail Removed)> wrote:

> Now we have an ADSL line... incoming signals are already digital ... we have
> a splitter of course to split off the signal to the phone .. is this still
> analogue? Are we receiving analogue AND digital signals?

No, they're all analogue....but across a much wider range (band) of
frequencies (hence 'broadband'). Lowest band is used for voice, and the
rest for signals that provide a digital signal when extracted. That's an
over-simplification and I could probably have put it better...

--
[ 7'ism - a condition by which the sufferer experiences an inability
to give concise answers, express reasoned argument or opinion.
Usually accompanied by silly noises and gestures - incurable, early
euthanasia recommended. ]

Kraftee wrote:
> code_wrong wrote:
>
>>Hi,
>>correct me if I am wrong:
>>When we had to dial-up to the internet we had a modem which converted
>>the incoming analogue phone signal into the required digital stream.
>>It converted the outbound digital signal to analogue. The telephones
>>worked with the analogue signal.
>>
>>Now we have an ADSL line... incoming signals are already digital ...
>>we have a splitter of course to split off the signal to the phone ..
>>is this still analogue? Are we receiving analogue AND digital signals?
>>cheers
>>cow
>
>
> Yes...
>
>

No.

The ADSL signal and the POTS signal are both analogue and each occupies
a different range of frequencies. The splitter (or micro filter to be
more accurate) simply prevents the ADSL signal from reaching the phone
and doing unpleasant things such as interfering with it and possibly
mixing with other signals in the line interface and producing
intermodulation in the ADSL spectrum.

--

Brian Morrison

please observe reply-to address

Brian Morrison wrote:
> Kraftee wrote:
>> code_wrong wrote:
>>
>>> Hi,
>>> correct me if I am wrong:
>>> When we had to dial-up to the internet we had a modem which
>>> converted the incoming analogue phone signal into the required
>>> digital stream. It converted the outbound digital signal to
>>> analogue. The telephones worked with the analogue signal.
>>>
>>> Now we have an ADSL line... incoming signals are already digital ...
>>> we have a splitter of course to split off the signal to the phone ..
>>> is this still analogue? Are we receiving analogue AND digital
>>> signals? cheers
>>> cow
>>
>>
>> Yes...
>>
>>
>
> No.
>
> The ADSL signal and the POTS signal are both analogue and each
> occupies a different range of frequencies. The splitter (or micro
> filter to be more accurate) simply prevents the ADSL signal from
> reaching the phone and doing unpleasant things such as interfering
> with it and possibly mixing with other signals in the line interface
> and producing intermodulation in the ADSL spectrum.

Beg to differ as there is no analogue to digital conversion with ADSL,
even the term DSL Modem is a misnomer, not unless , off course, you are
going to say that ISDN is analogue as well. The signals are sent in
binary ergo digital, but it is carried on the analogue Local loop..

Kraftee wrote:
> Brian Morrison wrote:
>> Kraftee wrote:
>>> code_wrong wrote:
>>>
>>>> Hi,
>>>> correct me if I am wrong:
>>>> When we had to dial-up to the internet we had a modem which
>>>> converted the incoming analogue phone signal into the required
>>>> digital stream. It converted the outbound digital signal to
>>>> analogue. The telephones worked with the analogue signal.
>>>>
>>>> Now we have an ADSL line... incoming signals are already digital
>>>> ... we have a splitter of course to split off the signal to the
>>>> phone .. is this still analogue? Are we receiving analogue AND
>>>> digital signals? cheers
>>>> cow
>>>
>>>
>>> Yes...
>>>
>>>
>>
>> No.
>>
>> The ADSL signal and the POTS signal are both analogue and each
>> occupies a different range of frequencies. The splitter (or micro
>> filter to be more accurate) simply prevents the ADSL signal from
>> reaching the phone and doing unpleasant things such as interfering
>> with it and possibly mixing with other signals in the line interface
>> and producing intermodulation in the ADSL spectrum.
>
> Beg to differ as there is no analogue to digital conversion with ADSL,
> even the term DSL Modem is a misnomer, not unless , off course, you
> are going to say that ISDN is analogue as well. The signals are sent
> in binary ergo digital, but it is carried on the analogue Local loop..

PS what do you think the D in DSL stands for......

Give you a clue, second letter is i & the last is l & gita is
inbetween...

Bob Eager wrote:
> On Mon, 14 Nov 2005 19:41:36 UTC, "code_wrong" <(E-Mail Removed)> wrote:
>
>> Now we have an ADSL line... incoming signals are already digital ...
>> we have a splitter of course to split off the signal to the phone ..
>> is this still analogue? Are we receiving analogue AND digital
>> signals?
>
> No, they're all analogue....but across a much wider range (band) of
> frequencies (hence 'broadband'). Lowest band is used for voice, and
> the rest for signals that provide a digital signal when extracted.
> That's an over-simplification and I could probably have put it
> better...

Which is why they are called _Digital_ Subscriber Lines (either
Asynchronous or Synchronous doesn't make any difference)???????????

Just because it's carried over a largely analogue local loop doesn't
make them any less digital

Kraftee wrote:
> Bob Eager wrote:
>
>>On Mon, 14 Nov 2005 19:41:36 UTC, "code_wrong" <(E-Mail Removed)> wrote:
>>
>>
>>>Now we have an ADSL line... incoming signals are already digital ...
>>>we have a splitter of course to split off the signal to the phone ..
>>>is this still analogue? Are we receiving analogue AND digital
>>>signals?
>>
>>No, they're all analogue....but across a much wider range (band) of
>>frequencies (hence 'broadband'). Lowest band is used for voice, and
>>the rest for signals that provide a digital signal when extracted.
>>That's an over-simplification and I could probably have put it
>>better...
>
>
> Which is why they are called _Digital_ Subscriber Lines (either
> Asynchronous or Synchronous doesn't make any difference)???????????
>
> Just because it's carried over a largely analogue local loop doesn't
> make them any less digital
>
>
The carrier is analogue, but the content is digital.

On Mon, 14 Nov 2005 21:30:23 UTC, Usenet <(E-Mail Removed)>
wrote:

> Kraftee wrote:
> > Bob Eager wrote:
> >
> >>On Mon, 14 Nov 2005 19:41:36 UTC, "code_wrong" <(E-Mail Removed)> wrote:
> >>
> >>
> >>>Now we have an ADSL line... incoming signals are already digital ...
> >>>we have a splitter of course to split off the signal to the phone ..
> >>>is this still analogue? Are we receiving analogue AND digital
> >>>signals?
> >>
> >>No, they're all analogue....but across a much wider range (band) of
> >>frequencies (hence 'broadband'). Lowest band is used for voice, and
> >>the rest for signals that provide a digital signal when extracted.
> >>That's an over-simplification and I could probably have put it
> >>better...
> >
> > Which is why they are called _Digital_ Subscriber Lines (either
> > Asynchronous or Synchronous doesn't make any difference)???????????
> >
> > Just because it's carried over a largely analogue local loop doesn't
> > make them any less digital
> >
> The carrier is analogue, but the content is digital.

Exactly.

--
[ 7'ism - a condition by which the sufferer experiences an inability
to give concise answers, express reasoned argument or opinion.
Usually accompanied by silly noises and gestures - incurable, early
euthanasia recommended. ]

"Usenet" <(E-Mail Removed)> wrote in message
news:437901ea$0$1450$(E-Mail Removed)...
>
>
> Kraftee wrote:
>> Bob Eager wrote:
>>
>>>On Mon, 14 Nov 2005 19:41:36 UTC, "code_wrong" <(E-Mail Removed)> wrote:
>>>
>>>
>>>>Now we have an ADSL line... incoming signals are already digital ...
>>>>we have a splitter of course to split off the signal to the phone ..
>>>>is this still analogue? Are we receiving analogue AND digital
>>>>signals?
>>>
>>>No, they're all analogue....but across a much wider range (band) of
>>>frequencies (hence 'broadband'). Lowest band is used for voice, and
>>>the rest for signals that provide a digital signal when extracted.
>>>That's an over-simplification and I could probably have put it
>>>better...
>>
>>
>> Which is why they are called _Digital_ Subscriber Lines (either
>> Asynchronous or Synchronous doesn't make any difference)???????????
>>
>> Just because it's carried over a largely analogue local loop doesn't make
>> them any less digital
> The carrier is analogue, but the content is digital.

my head hurts
So lets just say that we are receiving Analogue and Digital at the same
time.
What does the ADSL 'modem' do?