> -----Original Message-----
> From: David Woodhouse [mailto:[EMAIL PROTECTED]]
> Sent: 11 May 1999 11:43
[snip]
> All incoming calls are announced down the ISDN line along
> with the telephone
> number that they're destined for. All the ISDN equipment that
> you plug in has
> to decide which calls to respond to, so it has to be given
> 'its' telephone
> number. That is what's meant by 'MSN' in the i4l and Teles
> 2AB context.
Thanks for confirming that.
> It looks like the Home Highway installation comes with a
> digital-analogue
> converter - and three telephone numbers. Their box will
> respond to two of those
> numbers, and give you two analogue ports, one for each
> number. You have the
> third number available for use with real ISDN equipment.
Hmmm, that makes sense - I would really rather have had
3 numbers on ISDN, with option of separating one or two
to the analogue ports, but alright ....
Initially when I saw the box I thought it was simply an
ISDN terminator, plus a D/a converter. But maybe not.
> I don't know if it's possible to disable the analogue ports,
> and leave those
> numbers free to be answered by other digital equipment.
I guess I'm about to find out. Does anyone else on the
list know ?
> However, if you just want one (or two) numbers for normal
> analogue phone/fax,
> and a single number for digital incoming calls, it should be fine.
I can see that this will in fact work fine, except I'll need some
extra cabling since I can just hookup to the ISDN net around
the house. For the office e.g. I'll now be putting in a Cat5 cable
for ISDN, plus 2 regular phone cables for phone+fax. If I could
have had all 3 numbers on the ISDN line, I would simple have Cat5
cable to the office, then plugin the Teles AB box - oh well ...
[snip]
> > If I want to connect multiple ISDN devices to my newly acquired ISDN
> > connection (e.g. a phone, a fax, a PC, a Teles 2AB box), and be able
> > to direct incoming calls to a different device depending on
> the number
> > called, will I not need MSN ?
>
> You've listed four devices, and you only have three telephone
> numbers. But
> that's not necessarily a problem - calls also have a 'service
> indicator' which
> can be used to distinguish between analogue and digital
> calls. So you can have
> two different devices on the same telephone number - one
> answering voice calls, and the other answering data connexions.
But still - if I were to have 3 true ISDN devices running on my
ISDN net, would I not need 3 numbers on ISDN ? Eg. 2 numbers for
2 ISDN phones, and 1 number for an ISDN fax. ? I'm getting confused -
if BT says 'MSN' means 10 subscriber numbers, what exactly
am I getting with the 3 numbers on the HomeHW ? Is this, as you
suggested, ISDN with 1 number, plus 2 analogue lines with 1 number
each ?? Extremely odd if that is the case.
Many thanks for your reply - it certainly cleared up some of the
confusion.
Per Jessen,
ENIDAN Technologies, London
