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Bill,
Here's the pinout for a twisted pair cable to link two machines without
going thru' a hub. It's taken from the German magazine c't, Jan 97 page 261
and Feb 97 page 11 -
NB the pin numbers...
______________________________
Pin# Signal ¦ ¦ Signal Pin #
1 TX_D1+ ---__ __--- TX_D1+ 1
¦ --__ __-- ¦
¦ --__ __-- ¦
2 TX_D1- ---__ --__-- __--- TX_D1- 2
¦ --__ __-- --__ __-- ¦
¦ __--__ __--__ ¦
¦ __-- --__-- --__ ¦
3 RX_D2+ --- __-- --__ --- RX_D2+ 3
¦ __-- --__ ¦
¦ __-- --__ ¦
6 RX_D2- --- --- RX_D2- 6
¦ ¦
--------------------STOP - that's it for 10BaseT (normal twisted
pair Ethernet), also 100BaseT. ---------------------------------
For completeness, you may also wish to wire the following, to
make it work for 100BaseT4 and VG-Anylan too:
¦ ¦
4 BI_D3+ ---__ __--- BI_D3+ 4
¦ --__ __-- ¦
¦ --__ __-- ¦
5 BI_D3- ---__ --__-- __--- BI_D3- 5
¦ --__ __-- --__ __-- ¦
¦ __--__ __--__ ¦
¦ __-- --__-- --__ ¦
7 BI_D4+ --- __-- --__ --- BI_D4+ 7
¦ __-- --__ ¦
¦ __-- --__ ¦
8 BI_D4- --- --- BI_D4- 8
¦____________________________¦
cheers,
Andrew.
----------
From: Robert G. Stevens[SMTP:robsteve@ra.isisnet.com]
Sent: Dienstag, 28. Januar 1997 14:43
To: Bill Bryan; thinkpad@cs.utk.edu
Subject: Re: sneaker net
At 12:13 AM 28/01/97 -0500, Bill Bryan wrote:
> I'm thinking of replacing my 28.8 PC card modem with one of the new
>Megahertz 33.6 combo modem / ethernet cards (someone wants my old one). I
>would like to improve my connectability with my desktop machine in the
>basement. I do most of my computing on my thinkpad on the main floor.
>Both systems run Win95. If I stick a twisted pair ethernet card into the
>basement computer and connect the 2 what kind of major problems am I
>looking at? I've never tried this before except normal use Novell
>networks. Will this interfere with my Dial-up networking?
>
>B/B
>=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> Bill Bryan, Livonia, MI - billb@rust.net - N8QPI - www.rust.net/~billb
> "When the going gets weird, the weird turn pro" -- Hunter Thompson
>=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>
>
>
>
Bill:
I have done what you described and it works fine. Before installing or
inserting the Megahertz card get their latest drivers from their www site.
The only problem you may incur is with the cabling. On twisted pair, you
can connect two machines together without a hub but the wiring is different.
You need the same config used to connect hubs together. The normal cable
that goes from the computer to the hub is straight through. To connect two
computers directly, I think the pairs 1 and 3 and 2 and 6 need to be
flipped. You should confirm this.
As for problems with ThinkPads, sometimes they do not like to enter suspend
or hibernate with the card in. If you have this problem, stop the card
though the pcmcia icon and then go into suspend. I don't have this problem
any more and assume it may be from loading the latest Megahertz drives.
Regards
Robert Stevens
755CDV