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From: Adam David <adam@veda.is>
Message-Id: <199706212233.WAA19957@veda.is>
Subject: Re: getty modem control
In-Reply-To: <199706212127.OAA27870@phaeton.artisoft.com> from Terry Lambert at "Jun 21, 97 02:27:21 pm"
To: terry@lambert.org (Terry Lambert)
Date: Sat, 21 Jun 1997 22:33:03 +0000 (GMT)
Cc: terry@lambert.org, freebsd-current@FreeBSD.ORG
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> > > > I'm not making any progress with using the modem init string capability.
> > > > (DTR lights up but there is no flicker on TXD)
> > > 
> > > Look at the CTS/RTS settings, and how they effect the modem and
> > > UART in the DCD-not-present state, in particular.
> > 
> > Are you saying I need a special cable because the software is a hack,
> > or am I misconfiguring the software?
> 
> No.  I'm saying that CTS/RTS may be active, even in the absence of
> DCD.  If so, this modem is either broken, or misconfigured.
> 
> Typically, command interchange with a modem does not involve data
> exchanges larger than the buffer size.  The CTS/RTS should not be
> required until DCD is high, and thus the modem is doing data, not
> command, interchange.
> 
> Typically, the symptoms are "no data back from modem until DCD
> is present".  If you can't change the modem settings, then you
> will be limited to blind-dialing in all cases.

I can cu the device and get a normal response without carrier present.
However, getty times out trying to send the data, with no flicker on the
modem TXD.

--
Adam David <adam@veda.is>