Sorry if this an FAQ, but my head aches from repeated banging against
the wall...

I've attached a serial terminal (and HP 700/96) to S1 on my p630, and
it works fine.

Using the same null cable, I plug into a Sun E450 instead of the
terminal. I connect via 'tip hardwire' and am greeted with 'Connected'
(Incidentally, it says connected even if I have no cable plugged in.)
Anyway, I get no output.

Similarly, if I plug a PC into S1 and use hyperterminal, I get nothing.

I really need to get serial access from a networked machine so an admin
3K miles away can do some maintenance.

Don wrote:
> I've attached a serial terminal (and HP 700/96) to S1 on my p630, and
> it works fine.
>
> Using the same null cable, I plug into a Sun E450 instead of the
> terminal. I connect via 'tip hardwire' and am greeted with 'Connected'
> (Incidentally, it says connected even if I have no cable plugged in.)
> Anyway, I get no output.
>
> Similarly, if I plug a PC into S1 and use hyperterminal, I get nothing.
>
> I really need to get serial access from a networked machine so an admin
> 3K miles away can do some maintenance.

The S1 port on the pSeries RS/6000 units are RS232 serial ports set at
19200,8,None,1 and typically set to emulate a particular terminal type.
(NOTE: The older model RS/6000's all had default baud rates of 9600).

I am unfamiliar with a SUN E450...is that some sort of dumb terminal or
a serial port device? IMHO, your cable pinout is probably incorrect. If
you have one, use the DB9F to DB25M pigtail that often comes with the
system for the S1 port (P/N 40H6328) and then use a null modem cable
attached to that. I believe that should get the signals in the right
place.

Or you can verify/make your own...The IBM S1, S2, and S3 DB9 ports have
these pins:

1 (DCD)
2 (TXD)
3 (RXD)
4 (DTR)
5 (SG)
6 (DSR)
7 (RTS)
8 (CTS)

HTH,

Steve

E450 is an old Sun Enterprise server (SPARC/Soaris). It just happens
to sit next to the IBM box, so is a candidate for use as a terminal.

Anyway, I inherited the box and don't have the pigtail connector that
may have come with it. I suspected the cable was to blame, and fired a
note off to B&B electronics (frequently mentioned in this forum) to get
the proper cable ordered.

Thanks for the reply!

Hi,

In "smit tty" try adding the option "clocal" to your STTY attributes
(run time and login). Add it at the END of the other options, separate
with a comma.

If you have the right cable, it should work with a PC.

BTW, default speed for a p630 is like the older RS/6000, 9600bps.
19200 is for Power5 systems.

Pierre Malenfant

Thanks for the tty info... my cable has been shipped, so I'll try it as
soon as it comes in and post back the results.

I got this working. I had to add a tty (none were defined), enable
'permit login', and add the clocal attributes.

Now my question is... how could I enable serial access without booting
the OS? e.g. If I want to boot install media?

On a p630, connect a terminal/PC at 9600 bp ansd start the server.
When you get the first screen (IBM IBM IBM...) select "1" for SMS and
select your installation media.

Pierre Malenfant