VOIP/ADSL to replace ISDN - possibilities?

We currently have two lines into our house, a BT POTS line and a C&W
ISDN line. We used to use the ISDN for Internet access but ADSL came
to our little village in May this year so we now no longer need the
ISDN for that.

I did keep the ISDN going as backup for the ADSL but the ADSL is so
reliable we haven't needed it at all. Thus I'm thinking of getting
rid of the ISDN line and changing it back to a POTS line.

Although the ISDN line is a C&W one it's actually physically provided
by BT. What we'd *like* to do when we discontinue the ISDN is to keep
one of the MSN numbers which we advertise as the business line for our
small Ltd. company, I suspect that this may be well nigh imppossible
but still we can try I suppose.

More to the point as a question to this group, can one get anything
like MSN by using VOIP? It could well make sense to get a second
(cheap) ADSL account on the second line for backup anyway and we could
use it for VOIP. How expensive is it to get a number routed over VOIP
to a FAX machine for example?

--
Chris Green

.

Relevant Pages

  • Re: circuit for separating ISDN from DSL
    ... ringing impulse with ISDN and POTS? ... you have ISDN, ADSL, and DSL in a package? ... ISDN facility can be shared as a POTS facility. ...
    (sci.electronics.basics)
  • 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: ISDN in the UK
    ... You are right, I misread the web pages of Dutch IPS, I thought they were offering ADSL on ISDN lines when in fact they were offering to arrange the conversion of ISDN lines to analogue before applying ADSL. ... From the customer's point of view, the only noticeable difference is that you need a different ADSL modem (Annex-B rather than Annex-A, although some ADSL modems work on both POTS and ISDN lines, e.g. http://www.sweex.com/product.asp?pId=427) and a different splitter. ...
    (uk.telecom)
  • Re: running a business on just ISDN ??
    ... We have one ISDN line connected to an Agfeo ... We have one analogue line doing ADSL and fax. ... Plus the ping time is poor. ...
    (uk.telecom)
  • 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)