On Wed, May 16, 2001 at 11:15:52AM +0100, Dominic Mitchell wrote:
> On Wed, May 16, 2001 at 10:59:07AM +0100, Robin Szemeti wrote:
> > I do keep intending to do something cute with my ISDN adapter and log the
> > stuff coming out of the D channel and see whats in there ... but time has
> > prevented it etc.
>
> I'd be interested to hear how you get on... I was under the impression
> that the D channel was an always on 16k-thing. It'd be interesting to
> see what gets sent down there normally...
My faux-ISDN (HomeHighway) tells me things like:
* tei 115 calling +44 /8452120667, Great Britain with +44 1912/399999, Tyneside RING
(Data)
tei 115 calling +44 /8452120667, Great Britain with +44 1912/399999, Tyneside CONNECT
(Data)
tei 115 calling +44 /8452120667, Great Britain with +44 1912/399999, Tyneside 1.CI
0.120 DM (now
tei 115 calling +44 /8452120667, Great Britain with +44 1912/399999, Tyneside NEXT CI
AFTER 00:1 Euro 2, Wochenende (Samstag))
tei 115 calling +44 /8452120667, Great Britain with +44 1912/399999, Tyneside 0.CI
0.000 DM (aft )
tei 115 calling +44 /8452120667, Great Britain with +44 1912/399999, Tyneside NEXT CI
AFTER Euro 2, Wochenende (Samstag))
tei 115 calling +44 /8452120667, Great Britain with +44 1912/399999, Tyneside HINT:
Overall cheapest 01011:o.tel.o CbC 0.000 DM (saving 0.000 DM)
tei 115 calling +44 /8452120667, Great Britain with +44 1912/399999, Tyneside HINT:
LCR:OK
(The driver does numeric->German translations for free).
If anyone rings my number I vaguely remember it telling me the German
for "number withheld", but I don't answer anymore so no-one rings.
Real ISDN can use the D channel to do neat things like re-direct calls ...
without tying up any of your channels, your PBX just tells the exchange
to route the call elsewhere after you've looked at the details.
Some people on news:uk.telecom had various schemes for
- redirecting incoming junk faxes to other premium-rate fax numbers
- diverting CLID withheld to a TAM "This number does not accept anonymous
calls, please redial. You *have* been charged for this call. <click>"
- diverting CLID unavailable to a (different) TAM "Please leave a message".
--
Chris Benson
