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2 total messages Started by Matthias Sun, 28 Feb 1999 00:00
null-modem and LAN
#4046
Author: Matthias
Date: Sun, 28 Feb 1999 00:00
20 lines
1095 bytes
Hello,

I would like to realize a LAN with null-modem-serial-connections
between several computers an operaring-systems. 

Questions:
1) I have heard that there ist a way to do so with the win95-os ....
but how???? Something like SLIP-Connections???

2) And if there is a way, how does it work on dos, win 3.11 or
linux???

3) How long might be the distances between the computers. 

4) Can I also use a simple telephone-two-line-cable?

5) Is there a way with faster parallel-null-printer-cables?

CU
Matthias
Re: null-modem and LAN
#4047
Author: Paul Newhouse
Date: Sun, 28 Feb 1999 00:00
50 lines
3024 bytes
In article <36d95c80.2564654@newsserver.rrzn.uni-hannover.de>,
	dada@dada.de (Matthias) writes:
> Hello,
> 
> I would like to realize a LAN with null-modem-serial-connections
> between several computers an operaring-systems. 
> 
> Questions:
> 1) I have heard that there ist a way to do so with the win95-os ....
> but how???? Something like SLIP-Connections???
> 
> 2) And if there is a way, how does it work on dos, win 3.11 or
> linux???
> 
> 3) How long might be the distances between the computers. 
> 
> 4) Can I also use a simple telephone-two-line-cable?
> 
> 5) Is there a way with faster parallel-null-printer-cables?

How far apart are these various boxes?

With 10/100BaseT cards in the under $25 range I can't imagine why you would do 
the ppp/plip stuff.  I forget the distance limitations on serial ports (I'm 
thinking 300 feet but, it's been a while since I played with this).  It seems 
to me that to go over a few hundred feet we had to get some 422 adapters that 
had add on power supplies.  

We finally tossed the serial adapters and ran Tut Systems XL600's (10BaseT for
about 1200 feet on 1-pair cat3) over the one good pair we had available.
Of course they will cost you >$600/pair.

Run the linux box (or NetBSD) as a pppd server.  No modem cruft is necessary.
Have W9[58] make a ppp connection to the linux box. The unix side should 
probably run "persist" and "passive" definitely run any compression options
that are available (that doesn't mean they will work).  Parallel port connections 
are "PLIP" in Linux, NetBSD, ... .

Parallel connections should see about 500K bits/sec.  Most standard (came with
the original motherboard) serial ports are 115,200 bits/sec (you should be
able to get 75-90kbits/s or so with ftp).

Somebody in "comp.dcom.cabling" will have the details and URL's for you (try a
dejanews search first).

Good luck,
Paul
-- 
Use that connection!! Idle connections are the devil's playground!!
I, the Diabolical Ruler of the Universe, command it, OC-192 to every residence.
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