1.\" $NetBSD: dn.4,v 1.7 2001/04/11 19:23:00 wiz Exp $ 2.\" 3.\" Copyright (c) 1980, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" from: @(#)dn.4 8.1 (Berkeley) 6/5/93 35.\" 36.Dd June 5, 1993 37.Dt DN 4 vax 38.Os 39.Sh NAME 40.Nm dn 41.Nd 42.Tn DN-11 43serial autocall unit interface 44.Sh SYNOPSIS 45.Cd "dn0 at uba? csr 0160020 vector dnintr" 46.Sh DESCRIPTION 47The 48.Nm dn 49device provides an interface through a 50.Tn DEC 51.Tn DN-11 52(or equivalent 53such as the Able Quadracall) to an auto-call unit 54.Pq Tn ACU . 55To place an outgoing call one forks a sub-process which 56opens the appropriate call unit file, 57.Pa /dev/cua? 58and writes the phone number on it. The parent process 59then opens the corresponding modem line 60.Pa /dev/cul? . 61When the connection has been 62established, the open on the modem line 63.Pa /dev/cul? 64will return and the process will be connected. 65A timer is normally used to timeout the opening of 66the modem line. 67.Pp 68The codes for the phone numbers are: 69.Bl -column xxxx -offset indent 700-9 number to be dialed 71* dial * (`:' is a synonym) 72# dial # (`;' is a synonym) 73\- delay 20 milliseconds 74< end of phone number (`e' is a synonym) 75= delay for a second dial tone (`w' is a synonym) 76f force a hangup of any existing connection 77.El 78.Pp 79The phone number to be dialed must be presented as one contiguous string. 80.Pp 81By convention, even numbered call units are for 300 baud 82modem lines, while odd numbered units are for 1200 baud lines. 83For example, 84.Pa /dev/cua0 85is associated with a 300 baud modem line, 86.Pa /dev/cul0 , 87while 88.Pa /dev/cua1 89is associated with a 1200 baud modem line, 90.Pa /dev/cul1 . 91For devices such as the Quadracall which simulate multiple 92.Tn DN-11 93units, the minor device indicates which outgoing modem to use. 94.Sh FILES 95.Bl -tag -width /dev/cul? -compact 96.It Pa /dev/cua? 97call units 98.It Pa /dev/cul? 99associated modem lines 100.El 101.Sh DIAGNOSTICS 102Two error numbers are of interest at open time. 103.Bl -tag -width EBUSYxx 104.It Bq Er EBUSY 105The dialer is in use. 106.It Bq Er ENXIO 107The device doesn't exist, or there's no power to it. 108.El 109.Sh SEE ALSO 110.Xr tip 1 111.Sh HISTORY 112A 113.Nm 114driver appeared in 115.At v6 . 116