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Old January 19th 17, 08:52 AM posted to microsoft.public.windowsxp.help_and_support
R.Wieser
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Posts: 1,302
Default Alternative solution - was [ Manually setting a STATIC IP inWinXPPro]

Addendum,

I just re-read my post and see I didn't make my self too clear (excuse of
the day: It was late when I wrote it), I should have quoted an additional
line:

*NO*
A "cross over" cable connects two Ethernet ports.

....
A "null-modem" connects two DTE or two DCE together.


Those cables have the _exact same_ function, one for serial, the other for
ethernet.

And if I may point something else out, the phrase "connects two Ethernet
ports" is non-informative. Like if you would have used "two serial ports"
in the second.

Also consider that for ethernet all 'puters are comparable to DTEs from the
serial-port case, with the modems, hubs and switches taking the place of
DCEs. Maybe that makes it easier to see how both cables are effectivily the
same.

Regards,
Rudy Wieser


-- Origional message:
R.Wieser schreef in berichtnieuws
...
Richard,

*NO*

...
A "null-modem" connects two DTE or two DCE together.


As you feel that strong about it I googled to have some backup for what I
assumed to be true, and came across this page:

http://digital.ni.com/public.nsf/all...256F720071DECF

It shows that the so-called "null-modem" cable is to connect a two devices
of the _same type_ together (in other words: crossing the TXD and RXD
wires), and the "straight thru" to connect a DCE to a DTE.

To be honest, I have allways though of a "null modem" cable as being the

one
with just TXD and RXD (and ground ofcourse) connected to the other machine
(regardless of if it was of the same, or opposite type), with the control
lines connected back to their counterparts on the same connector.

So, it looks like we both made a mistake. :-)

P.S. I've been using null modems for 50 years ;}


I have been using them, and others of its kind for quite a while too, and
have even been known to solder a few myself. Regardless our time that we
used them, we both seem to have misremembered.

Also, age has little meaning on the "interwebz". Knowledge is the only
thing that counts here. :-)

Regards,
Rudy Wieser

P.s.
More of the same:

https://www.decisivetactics.com/supp...-or-null-modem
-vs-straight-through-serial-cable

http://www.zytrax.com/tech/layer_1/c...tech_rs232.htm

http://www.columbia.edu/kermit/cable.html

All show a "null modem" cable to connect two devices of the same type.

I'm not sure how you ...
Scratch that. I notice all your links are to the same source.


-- Origional message:
Richard Owlett schreef in berichtnieuws
...
On 1/18/2017 9:23 AM, R.Wieser wrote:
Richard,

The minimal network was being pursued as it was a close as
I *HAD THOUGHT* I could come to a "null modem cable".

Thats the "cross over" cable I mentioned* :-)

*although a null-modem cable normally includes cross-over, it does

need
to.

*NO*
A "cross over" cable connects two Ethernet ports.
https://en.wikipedia.org/wiki/Medium...ace#Auto_MDI-X

A "null-modem" connects two DTE or two DCE together.
https://en.wikipedia.org/wiki/Data_c...ting_equipment
https://en.wikipedia.org/wiki/Data_terminal_equipment
https://en.wikipedia.org/wiki/Null_modem

IOW connect COM ports of two computers to each other.

P.S. I've been using null modems for 50 years ;}
Ethernet is only ~30 years old.
https://en.wikipedia.org/wiki/Ethernet




But its still a good idea to first connect to a known-to-be-good

device
(the
modem or smart switch (or anything else with a web-accessible setup) I
mentioned) so that you can see your fixed IP actually works (on both
'puters), _before_ you try that cross-over cable (I'm not sure you

realize,
but now you've introduced a _third_ location that could give you

troubles
with setting up such a 'puter-to-'puter connection).

Regards,
Rudy Wieser


-- Origional question.
Richard Owlett schreef in berichtnieuws
...
On 1/16/2017 7:47 AM, Richard Owlett wrote:
I have two Lenovo laptops. One running WinXP Pro. The other runs
Linux.
I wish to create a minimal network. It will consist of only those
two machines.
Neither will have any internet connectivity.

I've found a number of web references to setting static IP
addresses on Windows machines.
*HOWEVER* assume internet connectivity by one/both machines.

Can anyone point me to any documentation EXPLICITLY covering my
{admittedly} peculiar requirement.

TIA

The minimal network was being pursued as it was a close as I *HAD
THOUGHT* I could come to a "null modem cable".
A USB implementation is available -
http://www.mouser.com/ds/2/163/DS_USBNMC-5030.pdf .
I'll check local suppliers.
Will also continue pursuing the LAN solution for its educational
value.







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