Re: circuit for separating ISDN from DSL

On 4/28/06 5:12 AM, in article
445206a9$0$11073$9b4e6d93@xxxxxxxxxxxxxxxxxxxxxxxxxx, "M. Bayerer"
<diebombeausdemwesten@xxxxxxxxxx> wrote:

Hello newsgroup,
we are three enthusiasted electronics amateurs and we got that idea into our
heads to build our own splitter box. I have a ISDN+ADSL connection at home.
Based on that connection we would like to separate the
a) DSL signal
b) ISDN signal
c) Analog telephone signal (POTS?)
with an appropriate self-implemented hardware setup.
Does someone have experience with this, which he / she would like to share
with me? Has somebody already implemented such a cicruit or could someone
explain to me how this is achieved best? A block diagram would be surely
helpful, because unfortunately we do not have much notion of the whole
telecom stuff.
Are there integrated solutions, i.e. special components, which one could
use? I would search for components myself but I don't have a clue under
which keyword those components are traded? It would also be helpful to know
something about the expected signal characteristics, e.g. voltage swing,
offset, frequency range, etc. I can remember something like voltage offset
of -60V at the POTS signal.... or something like that? What about the
ringing impulse with ISDN and POTS? It is definitely different with bioth, I
guess?!

Any kind of answer and held is highly appreciated.

Best regards Max




There isn't enough useful info here to help you at all, except to suggest
you go to google and learn much more.

What are the bit rates of the "ISDN," and the "ADSL signals?" Within a ISDN
structure it is unlikely you have an ADSL, but please explain how you figure
you have ISDN, ADSL, and DSL in a package? Also, there is no way that a
ISDN facility can be shared as a POTS facility. The POTS service would need
to be transported in one of the bearer channels of the ISDN, and NT2
hardware would be needed to provide conversion for the POTS phone (battery,
ringing, etc.).


Don

.

Relevant Pages

  • Re: ISDN2 + ADSL
    ... In the Netherlands you have the choice of ADSL over ISDN ... > The simple fact of the matter is that BT chose to supply ADSL over POTS, ...
    (uk.telecom)
  • Re: three mini-rants
    ... If you want a reliable landline phone, at least in .nl, POTS or ISDN is ... that he could just plug his ISDN small business PBX into the back of our ... Around here, until a few years back, all DSL was shared-line, then they ...
    (alt.sysadmin.recovery)
  • Re: ISDN2 + ADSL
    ... >> ISDN is widespread, if you want ADSL, you get an ISDN upgrade as well. ... > manage to work round it no problem! ... The simple fact of the matter is that BT chose to supply ADSL over POTS, ...
    (uk.telecom)
  • Re: ISDN in the UK
    ... >It is perfectly feasible to deliver ADSL on an ISDN line, it's just that BT, ... >still being in the dark ages in some respects, ... typical ADSL over ISDN upstream with the bottom of ADSL over POTS ...
    (uk.telecom)
  • Re: In deep water with ISDN / Broadband install
    ... I think you actually have is just an ISDN line, ... a dedicated 128kbs data line, no POTS ... still plugged into the same master socket that it always was. ... and disconnect the line at the exchange. ...
    (uk.telecom.broadband)