Re: Silly modem problem

[awilliam@xxxxxxxxxxxxx]

> I have a 56K external USR modem that works great on one machine 
running
> Red Hat 6.1.  In fact, I am using it at this very moment to send this
> e-mail.  But as soon as I move it over to another box I have problems.
> This other machine is also runnung RH 6.1.  If I type 'at' I get no
> response from the modem.  However, if I type 'atdt' I get no textual
> response but I can hear a dialtone through the modem speaker.  I can 
even
> have it dial a number and it will connect but I get no text printed on 
the
> screen.

This sounds like a very classic IRQ conflict.

> Like I said above, the same modem and cable work great on the machine 
I am
> using now.  I have tried both serial ports and they both behave the 
same.
> I have the port I am using set to 3f8, IRQ 4 in the bios and setserial
> confirms that.

setserial will happily permit IRQ conflicts.  Can you set the BIOS of 
the machines to protect "IRQ 4" for legacy or ISA devices that way no 
maurauding PnP devices can steal it.

> One peculiar thing I did notice is that both the terminal ready and 
clear
> to send lights are lit all the time when the modem is hooked up to the
> problem machine.  When it is hooked to the good machine only clear to 
send
> is lit if the modem is not in use.

So this is an external modem?  Are you using the same cable?