Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!cs.utexas.edu!natinst!bigtex!james
From: james@bigtex.uucp (James Van Artsdalen)
Newsgroups: comp.sys.ibm.pc
Subject: Re: ISDN
Message-ID: <6108@bigtex.uucp>
Date: 13 Aug 88 22:39:09 GMT
References: <18.23040D6B@rubbs1.FIDONET.ORG>
Reply-To: james@bigtex.UUCP (James Van Artsdalen)
Organization: F.B.N. Software, Austin TX
Lines: 19

In article <18.23040D6B@rubbs1.FIDONET.ORG>, Mark.Medici@rubbs1.FIDONET.ORG (Mark Medici) wrote:

> My understanding is that you won't need a modem with ISDN, that it
> will accept digital signals.  I also beleive that there will be an
> interface to allow non-ISDN data equipment to be used on ISDN lines,
> but you might need a similar setup at both ends.

I would tend to suspect that high speed modems like the Trailblazer+
wouldn't easily survive the analog->digital->analog transition.  Even
if they did, you still have to have a black box for your PC: Mess-DOS
rolls over dead at the thought of 9600bps (interrupt latency on
extended memory on slow machines), much less 8Kbytes/sec!  I rather
expect the problem is worse on OS/2 (for different reasons).  Even
using an NS16550A serial chip with the 16 byte FIFO isn't going to cut
the interrupt rate enough, not that the Mess-DOS file system is
currently good for sustained 8K/sec anyway.
-- 
James R. Van Artsdalen    ...!uunet!utastro!bigtex!james     "Live Free or Die"
Home: 512-346-2444 Work: 328-0282; 110 Wild Basin Rd. Ste #230, Austin TX 78746