[Asterisk-Users] some EICON Diva 4BRI questions

[Armin Schindler]

On Wed, 26 Apr 2006, Klaus Darilion wrote:
> On Sun, April 23, 2006 16:30, Armin Schindler said:
> > On Sat, 22 Apr 2006, Klaus Darilion wrote:
> >> But I'm still confused. Usually, if a line needs termination, the
> >> termination is needed on both ends. Thus, if there is no line
> >> termination
> >> inside the DIVA card, we would termination in TE mode too.
> >
> > Sorry, I don't know why this is different to 'normal' ISDN line. Maybe
> > the difference is about the distance. A normal ISDN line may be more than
> > a
> > few meters, but in NT-mode I have my PBX/Equipment connected to the card
> > with a one meter cross-cable.
> >
> > I will try to find out more about this.
> 
> Hi Armin!
> 
> Could you find out something?

Yes, I asked Eicon. The cards don't have internal termination. The ports are
layed out for TE mode, so depending on your ISDN bus topology, you need a 
termination.
And you are right, when in NT-mode both sides needs termination.... just 
normal ISDN bus topology.

Since I have only one termination in the middle of my cross cable, which 
works fine, I assume that the termination is not really necessary on both 
sides when having just a one meter cable.

Armin