[MLB-WIRELESS] ISDN at local call costs

[Marian Szczepkowski]

Data over voice is a marketing thing, ISDN is a pure digital link the 
voice service
is requested in the bearer capability IE of a setup message and is used 
for charging.

The service requested will only impact if the call is routed through an 
analogue bearer.

This may happen on international and STD trunk routes.

You will get a 64k hole whether or either a speech, 3.1k audio, or 64k 
digital 
bearer capability.

56k is not so much supported as ignored, it is an american thing and the 
data is pushed
through a 64k hole. You get 56k by robbing the LSB out of 8 bits. This 
has no effect on voice,
but screws digital hence 56k was invented. There is a 56k restricted 
digital bearer 
capability defined in the standard but nobody uses it localy.

Regards
Marian. S.

>>>>>>>>>>>>>>>>>> Original Message <<<<<<<<<<<<<<<<<<

On 1/19/02, 4:44:35 AM, Clae <clae13 at yahoo.com> wrote regarding Re: 
[MLB-WIRELESS] ISDN at local call costs:


> >Labyrinth (http://www.labyrinth.com.au/products/home/dov.html)
> >offers a similar service for $39.50 a month. There's set-up fees,
> >line rental, equipment and call charges on top of that as well.
> >Bu what is stopping someone from direct-dialling via a modem and
> >dedicated line to another node if there's no LoS, even if it is only
> >56kbps? Other than the fact it will be slower than ISDN?
> >- Barry

> it won't be 56k either - you only get that if you're dialing into an
> ISP with digital modems, so you'd eb getting 33k.  at least that's
> the way i understand.

> clae.


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