[Asterisk-Dev] best approach for a new isdn driver mainly for asterisk.. ?!

[Pauline Middelink]

On Thu, 24 Apr 2003 around 14:44:28 +0200, Patrick wrote:
> In the PBX4Linux documentation (http://isdn.jolly.de) I read that for
> each ISDN phone you need to do some hacks with an NT1 and a crossed
> cable. Although it is pretty cool that Andreas donated PBX4Linux to the
> community, imho it is not really a clean professional solution to sell
> to a business. For one, NT1 boxes are owned by the PTT and can afaik not
> be bought separately from the PTT. So you would have to find them
> somewhere else. If the business has 10 phones, those 10 NT1 boxes + 10
> used electricity outlets become a mess if not cost prohibitive assuming
> you can even find the 2nd hand NT1 boxes. Otoh it seems suitable for a
> home setup.

Eh, you dont _need_ NT1s, just some way of injecting power on the
cable and terminating the ISDN bus. Any way is ok. If you are handy
with a soldering iron bug some rj45 chassis parts and fire away.
(pun intended)
Maybe a nice 19" patchpannel? About 45 euro's (closed steel box version)
and some resistors is all you need -> 12 powered ISDN lines ready to roar.

He only took an only NT1 because he had in laying around. Not many
ppl do...

<Digium>
However, 12 ISDN cards in a single PC would be hard pressed, to please
get us a quad HFC based ISDN card. And even more please: place a little
jumper on every of the 4 lines, so the card will add its own power
and termination and we dont need to kludge with cables and adapters.
</Digium>

    Met vriendelijke groet,
        Pauline Middelink
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