[CentOS] finding the right serial port, enabling & configuring it [was: Re: fax software]
Robert Heller
heller at deepsoft.com
Mon Mar 28 20:22:31 UTC 2011
At Mon, 28 Mar 2011 15:53:50 -0400 CentOS mailing list <centos at centos.org> wrote:
>
> On 03/28/2011 05:59 AM Adam Tauno Williams wrote:
> > On Sun, 2011-03-27 at 22:41 -0400, ken wrote:
> >> It's been many years, but it seems that I have to receive a fax and
> >> might have to send one too. Is there a way to do this on CentOS 5.5?
> >> (Hope so.)
> >
> > Hylafax; has been quietly running at work, without incident, for years.
> > <http://www.hylafax.org/content/Main_Page>
>
> Thanks everyone for your suggestions. I remember both of these packages
> from years ago-- the last time I set up a fax. At that time I bought an
> internal modem-- not a Winmodem, one with jumpers on it to set the com
> port and I believe the interrupt also. Now, however, I'm working on a
> laptop with a serial chip on the mainboard and it's a different story.
Is this an RS232 port connected to an external modem or is it some sort
of internal modem?
>
> I've been reading the Serial-HOWTO, but it's a huge doc and I hope I
> don't need to read this entire monograph to get the serial port set up
> for the modem so that the fax software can use it.
>
> I've run minicom to see if I can dial out with it-- to test if I have
> the modem's serial port enabled and configured properly. So far, no
> joy. Anyone have tips to set up the modem so that efax or (more likely)
> hylafax can use it?
Almost all *internal* modems (esp. on laptops) are Winmodems and are
thus pretty close to useless under Linux. It might be easier / cheaper
/ less agravating to just go down to Best Buy and buy a Creative
Blaster analog RS232 serial modem. Something like $50US. Note: most
newer laptops don't have an external RS232 connection, so you will need
to get a USB=>RS232 adapter, most of which work out-of-the-box under
Linux. (Don't get a USB connected analog modem -- most of these are
Winmodems or something equally odd.)
Otherwise, what does:
/bin/setserial -g /dev/ttyS*
display?
(You might need to be root to do this:
sudo /bin/setserial -g /dev/ttyS*
)
For example my IBM Thinkpad X31 gives this:
gollum.deepsoft.com% sudo /bin/setserial -g /dev/ttyS*
/dev/ttyS0, UART: undefined, Port: 0x03f8, IRQ: 4
/dev/ttyS1, UART: unknown, Port: 0x02f8, IRQ: 3
/dev/ttyS2, UART: unknown, Port: 0x03e8, IRQ: 4
/dev/ttyS3, UART: unknown, Port: 0x02e8, IRQ: 3
I think /dev/ttyS0 is the IR port, which I don't use. The Winmodem does
not show up as a /dev/ttyS* port, since it is not really a serial port
at all.
>
> Much appreciated.
>
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--
Robert Heller -- 978-544-6933 / heller at deepsoft.com
Deepwoods Software -- http://www.deepsoft.com/
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