1993-08-01 11:32:48 +04:00
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.\" Copyright (c) 1980, 1991 Regents of the University of California.
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.\" All rights reserved.
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1993-03-21 12:45:37 +03:00
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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1993-08-01 11:32:48 +04:00
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.\" from: @(#)dn.4 6.2 (Berkeley) 3/27/91
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.\" $Id: dn.4,v 1.2 1993/08/01 07:36:25 mycroft Exp $
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1993-03-21 12:45:37 +03:00
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.\"
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1993-08-01 11:32:48 +04:00
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.Dd March 27, 1991
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1993-03-21 12:45:37 +03:00
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.Dt DN 4 vax
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.Os BSD 4
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.Sh NAME
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.Nm dn
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.Nd
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.Tn DN-11
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autocall unit interface
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.Sh SYNOPSIS
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.Cd "device dn0 at uba? csr 0160020 vector dnintr"
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.Sh DESCRIPTION
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The
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.Nm dn
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device provides an interface through a
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.Tn DEC
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.Tn DN-11
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(or equivalent
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such as the Able Quadracall) to an auto-call unit
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.Pq Tn ACU .
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To place an outgoing call one forks a sub-process which
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opens the appropriate call unit file,
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.Pa /dev/cua?
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and writes the phone number on it. The parent process
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then opens the corresponding modem line
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.Pa /dev/cul? .
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When the connection has been
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established, the open on the modem line
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.Pa /dev/cul?
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will return and the process will be connected.
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A timer is normally used to timeout the opening of
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the modem line.
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.Pp
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The codes for the phone numbers are:
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.Bl -column xxxx -offset indent
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0-9 number to be dialed
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* dial * (`:' is a synonym)
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# dial # (`;' is a synonym)
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\- delay 20 milliseconds
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< end of phone number (`e' is a synonym)
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= delay for a second dial tone (`w' is a synonym)
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f force a hangup of any existing connection
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.El
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.Pp
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The phone number to be dialed must be presented as one contiguous string.
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.Pp
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By convention, even numbered call units are for 300 baud
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modem lines, while odd numbered units are for 1200 baud lines.
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For example,
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.Pa /dev/cua0
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is associated with a 300 baud modem line,
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.Pa /dev/cul0 ,
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while
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.Pa /dev/cua1
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is associated with a 1200 baud modem line,
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.Pa /dev/cul1 .
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For devices such as the Quadracall which simulate multiple
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.Tn DN-11
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units, the minor device indicates which outgoing modem to use.
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.Sh FILES
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.Bl -tag -width /dev/cul? -compact
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.It Pa /dev/cua?
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call units
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.It Pa /dev/cul?
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associated modem lines
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.El
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.Sh DIAGNOSTICS
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Two error numbers are of interest at open time.
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.Bl -tag -width EBUSYxx
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.It Bq Er EBUSY
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The dialer is in use.
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.It Bq Er ENXIO
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The device doesn't exist, or there's no power to it.
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.El
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.Sh SEE ALSO
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.Xr tip 1
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.Sh HISTORY
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A
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.Nm
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driver appeared in
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.At v6 .
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