[Asterisk-Users] Multiple ISDN BRI Units with AsteriskusingBristuff zaphfc in NT mode?

[asterisk]

The terminating resistors, or lack of, should not effect correct operation
if bri circuits unless multiple devices are sharing the same bus. From
experience even then are not essential unless it is a long line.

Neil

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Jan Snelders
Sent: 16 July 2005 21:38
To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
Subject: RE: [Asterisk-Users] Multiple ISDN BRI Units with
AsteriskusingBristuff zaphfc in NT mode?

Try terminating using 50 ohm resistors as suggested by this guide:
http://home.foni.net/~jolly1/download/PBX4Linux-2.5.html
in chapter 2.2 (Connect ISDN telephones to your ISDN card.)

Best regards,

Jan Snelders

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Zoltan Szecsei
Sent: zaterdag 16 juli 2005 12:54
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Multiple ISDN BRI Units with Asterisk
usingBristuff zaphfc in NT mode?

Carl Andersson wrote:

> Maybe this is rather a hardware question, but I am posting it on this 
> list because the probability of someone else of you having tried this 
> is greater here than other places I can think of.
>
> I have an ISDN card that is setup in NT mode using the zaphfc driver 
> in bristuff, and I got it working perfectly with one ISDN phone using 
> a crossover cable and 100 ohm termination at the end of the cable.
>
> However, if I connect one more ISDN device to the ISDN bus both 
> devices stop working, so the question is:
>
> Is it only possible to use one device with a HFC card in NT mode or is 
> there something else I need to do first to make it work with two devices?
>
Hi Carl,
I just started yesterday afternoon with exactly the same setup so you 
are a bit ahead of me.
If anyone answers you directly then please be kind enough to forward 
their comments to me.

I have not even tried to sort out trunks, bristuff or anything yet but 
it might be worth pointing out that my initial problems were that, using 
an old pIII motherboard with pci graphics, network plus 2 HFC bri isdn 
cards, I ran out of IRQs. I had to lock down & exclude the irq for the 
network card before the 2 ISDN cards woke up. I now have the network & 1 
ISDN card on their own IRQ and the graphics and 2nd ISDN card sharing an 
IRQ.

Maybe this could be a similar problem for you?

I'm  using this HW with AAH 1.1

Keep in touch,

Cheers,
Zoltan

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