RE: Best way to detect received call on dumb modem ...

["Lewis Brown" <lewisb@denveronline.com>]

Sorry for not being more specific.

I thought a 'dumb' modem was one that had been taken out of command mode
and thus does not respond to AT commands; at least that's what I meant.


I should say that this is an old problem that I haven't worked on in
over 9 months, so I've forgotten some of the details of my problem.  I
think that in dumb state, the modem can't send RING, CONNECT, etc., so
one must detect DSR, DTR, RNG, etc.  At least that's what I want to do.

When I wrote this program the first time, it worked great and was really
fast.  Then I moved it to the real hardware, a DIGI RAS box, which
didn't have all the standard IOCTLs.  The program now requires the
modems to be in command mode; I have to parse the stream for RING,
CONNECT, OK, etc;  and it is slow and very prone to error.  Seems the
modems are always going haywire this way.  I want to go back to dumb
mode and work as close as possible to the hardware.  I need speed and
reliability.

Any suggestions are much appreciated.
lb

-----Original Message-----
From: linux-serial-owner@vger.kernel.org
[mailto:linux-serial-owner@vger.kernel.org] On Behalf Of Jan-Benedict
Glaw
Sent: Saturday, November 01, 2003 2:14 PM
To: linux-serial@vger.kernel.org
Subject: Re: Best way to detect received call on dumb modem ...


On Sat, 2003-11-01 13:43:23 -0700, Lewis Brown <lewisb@denveronline.com>
wrote in message <000001c3a0b8$ce82efa0$0200000a@francois>:
> Hello,
> 
> I'm trying to detect incoming calls on a dumb modem but dealing with a
> driver that doesn't implement TIOCMIWAIT or TIOCGICOUNT. I'm puzzled
how
> best to go forward in an efficient way.

select() on the fd and wait until you receive "RING"? However, what's a
"dumb" modem?

MfG, JBG

-- 
   Jan-Benedict Glaw       jbglaw@lug-owl.de    . +49-172-7608481
   "Eine Freie Meinung in  einem Freien Kopf    | Gegen Zensur | Gegen
Krieg
    fuer einen Freien Staat voll Freier Bürger" | im Internet! |   im
Irak!
   ret = do_actions((curr | FREE_SPEECH) & ~(NEW_COPYRIGHT_LAW | DRM |
TCPA));


-
To unsubscribe from this list: send the line "unsubscribe linux-serial" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html