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can't connect by null modem

This is a discussion on can't connect by null modem within the AIX Operating System forums, part of the Unix Operating Systems category; --> Hi, I have recover a Bull dpx/20 (the same machine than IBM rs6000 I think) It run with AIX ...


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  #1 (permalink)  
Old 01-05-2008, 02:47 AM
Jerome
 
Posts: n/a
Default can't connect by null modem

Hi,

I have recover a Bull dpx/20 (the same machine than IBM rs6000 I think)
It run with AIX 4.3.3, without video card. I don't have asynchrone terminal.
So try a null modem cable to connect the aix machine with a Linux pc and
minicom.

I can see the boot log :
..
..
..

************************************************** ***************************
*
* Resuming Desktop Login...
*
************************************************** ***************************


************************************************** ***************************
*
* Suspending Desktop Login...
*
* Press [Enter] for a login prompt.
*
* Log in. Desktop Login will resume shortly after you log out.
*
************************************************** ***************************

But no loggin prompt when I pess enter, just back to a new line
If I press other keys I can see the result on the screnn, ctrl+h work
fine to delete caracter...

here the diagram of my cable :

aix DB25 Linux DB9
2 2
3 3
6 4
7 5
20 6
5 7
4 8

Is my cable wrong ?
Should I try another config of minicom ?

Tanks

Jerome
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  #2 (permalink)  
Old 01-05-2008, 02:48 AM
Jerald H. Mathews
 
Posts: n/a
Default Re: can't connect by null modem

Jerome <bagattin@mail.pf> wrote:
> Hi,


> I have recover a Bull dpx/20 (the same machine than IBM rs6000 I think)
> It run with AIX 4.3.3, without video card. I don't have asynchrone terminal.
> So try a null modem cable to connect the aix machine with a Linux pc and
> minicom.


> I can see the boot log :
> .
> here the diagram of my cable :


> aix DB25 Linux DB9
> 2 2
> 3 3
> 6 4
> 7 5
> 20 6
> 5 7
> 4 8


> Is my cable wrong ?
> Should I try another config of minicom ?


Connect DB25 pins 6 and 8 to DB9 pin 4 also
pin 20 (DB25) to pins 6 and 1 (DB9). Most important is pin 8 DCD on the
DB25. That cursed getty device driver wants to see both DSR (pin 6) and
DCD (pin 8).
--
Regards,
Jerry M.

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