If you are not familiar with ISDN, be aware that any TA you use will need a
"U" interface (two-wire interface to the Telco). If your TA has an ST
interface you will need an NT1 adapter to convert the Telco 2-wire interface
to a 4-wire ST interface. Hint: NT1 = $150.00.
I only mention this because some of the PC based TA's don't have an onboard
NT1.
BTW !!! this info is only true for United States installations. Canada and
Mexico Telco's will supply an NT1 if asked (no idea of charges).
-----Original Message-----
From: Joachim Holst [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, February 01, 2000 3:08 PM
To: [EMAIL PROTECTED]
Subject: Re: [expert] ISDN adapter questions
On Mon, 31 Jan 2000, you wrote:
> On Mon, 31 Jan 2000, you wrote:
Hi John !
Thank's for the info !
> > Hi !
> >
> > I've just got ISDN installed and am in the process of deciding which
ISDN TA to
> > buy. I have decided that I want an internal PCI/ISA adaptor and have
found two
> > models that I think might be quite good. However, I'm not familiar with
ISDN
> > and the technology that comes with it. The cards that I have found, is
one
> > Asuscom and one without name that is based on the HFC chip.
> >
> RUN from the HFC chip....that's a WinModem chipset, I
> believe...
I've been looking around the net and found www.isdn4linux.de (included in
both
RH 6.1 and MD 7.0 I believe). According to this site, both TA's work and are
supported. The HFC chip has one advantage, it can echo sent data to the isdn
log and with a bit of wireing, it can do quite a lot of aother interesting
things that the Asuscom can't. The Asuscom is built on a chip called WinBond
but is supported.
> Second, I use an external ISDN router made by Netgear
> (who's parent company is Bay Networks...) It works like a
> charm! I'd really recommend that, because you KNOW it works
> with ANY operating system! I've got one at home and am
> using it with both Linux and Windows machines. We also
> highly recommend it at the ISP where I work.
> The Lucent/Ascend Pipeline series are nice, but they're
> rather expensive...
> John
The reason that I don't want an external TA is because of to little space in
my
apartement and I don't want to buy a new serial card (if neccesary). This
will
increase my cost of getting up&running with ISDN too much. The external TA's
that I've found cost twice as much as an internal. I know that the external
one
is an active TA that lets me do a lot of fun things like receiving
faxes/voice
and many also give me 2 analog lines. I believe that the same is possible on
the passive cards, but require software instead. Anyhow, I don't quite need
those features yet. I'm mostly in a trial period for the moment. I'm not
sure
that I will find ISDN useful.
The word router, makes me think of a stand alone unit that is connected to
the
local network. In this case, in my experience I can't tell the router not to
open a connection on certain packet types and port numbers. I live in Sweden
with high minute rates for the use of a phone line :-(
/Jocke!
--
"The chain which can be yanked is not the eternal chain."
-- G. Fitch
