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#1 (**permalink**) 01-16-2008, 12:55 PM

I connected a modem to a sun ultra-250 on serial port /dev/cua/a.
Using the admintool and selecting the settings for modem bidirectional
everything works fine (tested with tip -19200 /dev/cua/a)

Now I connect the same modem with the same configuration to
/dev/cua/b.
Testing again with tip -19200 /dev/cua/b there is a beep and the
string connected. But nothing else happens, no answer to any at
command.

Is there a general problem with port b on SUN ultra-250?
Wo can help?

--bb

#2 (**permalink**) 01-16-2008, 12:55 PM

becker@tm-ma.de (bebe) writes:
>I connected a modem to a sun ultra-250 on serial port /dev/cua/a.
>Using the admintool and selecting the settings for modem bidirectional
>everything works fine (tested with tip -19200 /dev/cua/a)
>
>Now I connect the same modem with the same configuration to
>/dev/cua/b.
>Testing again with tip -19200 /dev/cua/b there is a beep and the
>string connected. But nothing else happens, no answer to any at
>command.
>
>Is there a general problem with port b on SUN ultra-250?
>Wo can help?
>

See document 28032 on http://sunsolve.sun.com/ for the proper
steps on attaching and configuring an external modem on a Sparc
machine. Search for the number "28032" and you'll find that
document and the ones that refer to it.

Make sure the modem is NOT connected to the E250's console port.

-Greg
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Do NOT reply via e-mail.
Reply in the newsgroup.

#3 (**permalink**) 01-16-2008, 12:55 PM

gerg@panix.com (Greg Andrews) wrote in message news:<cdn1ah$d1v$1@reader2.panix.com>...
> becker@tm-ma.de (bebe) writes:
> >I connected a modem to a sun ultra-250 on serial port /dev/cua/a.
> >Using the admintool and selecting the settings for modem bidirectional
> >everything works fine (tested with tip -19200 /dev/cua/a)
> >
> >Now I connect the same modem with the same configuration to
> >/dev/cua/b.
> >Testing again with tip -19200 /dev/cua/b there is a beep and the
> >string connected. But nothing else happens, no answer to any at
> >command.
> >
> >Is there a general problem with port b on SUN ultra-250?
> >Wo can help?
> >
>
> See document 28032 on http://sunsolve.sun.com/ for the proper
> steps on attaching and configuring an external modem on a Sparc
> machine. Search for the number "28032" and you'll find that
> document and the ones that refer to it.
>
> Make sure the modem is NOT connected to the E250's console port.
>
>
> -Greg

Installation / Configuration was done according to Sun InfoDOC 28032
for both serial ports. First on port b with the problems mentioned
above. After that for testing on port A without any problems. In
normal operation port A is occupied (UPS control).
-bb

#4 (**permalink**) 01-16-2008, 12:55 PM

becker@tm-ma.de (bebe) writes:
>gerg@panix.com (Greg Andrews) wrote in message
>
>Installation / Configuration was done according to Sun InfoDOC 28032
>for both serial ports. First on port b with the problems mentioned
>above. After that for testing on port A without any problems. In
>normal operation port A is occupied (UPS control).
>

Then there are three possibilities:

o Port B is the console for the E250, and you should not
connect a modem to it.

o You used a different cable when connecting the modem to
Port B than you used for Port A, and the cable is wrong.

o Something is wrong with your E250's Port B.

-Greg
--
Do NOT reply via e-mail.
Reply in the newsgroup.

#5 (**permalink**) 01-16-2008, 12:55 PM

becker@tm-ma.de (bebe) writes:
>
>Installation / Configuration was done according to Sun InfoDOC 28032
>for both serial ports. First on port b with the problems mentioned
>above. After that for testing on port A without any problems. In
>normal operation port A is occupied (UPS control).
>

Have you tried a loopback test on Port B? Unbend a metal
paper clip into a U shape, and plug the ends of the clip
into the B port's pin 2 and 3. Then tip -19200 /dev/cua/b
and see if your keystrokes are displayed on your screen.

If your keystrokes are displayed, then the port is working.
Look at your cable for the problem. If your keystrokes are
not displayed, make sure the paper clip really is shorting
pin 2 to pin 3. If it is, then the port circuitry is probably
broken.

-Greg
--
Do NOT reply via e-mail.
Reply in the newsgroup.

#6 (**permalink**) 01-16-2008, 12:55 PM

gerg@panix.com (Greg Andrews) wrote in message news:<cdp0k0$33f$1@reader2.panix.com>...
> becker@tm-ma.de (bebe) writes:
> >gerg@panix.com (Greg Andrews) wrote in message
> >
> >Installation / Configuration was done according to Sun InfoDOC 28032
> >for both serial ports. First on port b with the problems mentioned
> >above. After that for testing on port A without any problems. In
> >normal operation port A is occupied (UPS control).
> >
>
> Then there are three possibilities:
>
> o Port B is the console for the E250, and you should not
> connect a modem to it.
>
> o You used a different cable when connecting the modem to
> Port B than you used for Port A, and the cable is wrong.
>
> o Something is wrong with your E250's Port B.
>
>
> -Greg

Hi Greg,

possibility no. 3 was right.
After changing the system board everything works on both ports.
Thank you for your help!

-- bebe

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no answer on cua/b