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Annotation of 43BSDReno/share/man/man4/man4.vax/dn.4, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1980 Regents of the University of California.
        !             2: .\" All rights reserved.  The Berkeley software License Agreement
        !             3: .\" specifies the terms and conditions for redistribution.
        !             4: .\"
        !             5: .\"    @(#)dn.4        6.1 (Berkeley) 5/15/85
        !             6: .\"
        !             7: .TH DN 4 "May 15, 1985"
        !             8: .UC 4
        !             9: .SH NAME
        !            10: dn \- DN-11 autocall unit interface
        !            11: .SH SYNOPSIS
        !            12: .B "device dn0 at uba? csr 0160020 vector dnintr"
        !            13: .SH DESCRIPTION
        !            14: The
        !            15: .I dn
        !            16: device provides an interface through a DEC DN-11 (or equivalent
        !            17: such as the Able Quadracall) to an auto-call unit (ACU).
        !            18: To place an outgoing call one forks a sub-process which
        !            19: opens the appropriate call unit file,
        !            20: .I /dev/cua?
        !            21: and writes the phone number on it.  The parent process
        !            22: then opens the corresponding modem line
        !            23: .IR /dev/cul? .
        !            24: When the connection has been
        !            25: established, the open on the modem line,
        !            26: .I /dev/cul?
        !            27: will return and the process will be connected.
        !            28: A timer is normally used to timeout the opening of 
        !            29: the modem line.
        !            30: .PP
        !            31: The codes for the phone numbers are:
        !            32: .PP
        !            33: .nf
        !            34: .ta \w'0-9    'u
        !            35: 0-9    dial 0-9
        !            36: *      dial * (`:' is a synonym)
        !            37: #      dial # (`;' is a synonym)
        !            38: \-     delay 20 milliseconds
        !            39: <      end-of-number (`e' is a synonym)
        !            40: =      delay for a second dial tone (`w' is a synonym)
        !            41: f      force a hangup of any existing connection
        !            42: .fi
        !            43: .PP
        !            44: The entire telephone number must be presented in a single
        !            45: .I write
        !            46: system call.
        !            47: .PP
        !            48: By convention, even numbered call units are for 300 baud
        !            49: modem lines, while odd numbered units are for 1200 baud lines.
        !            50: For example,
        !            51: .I /dev/cua0
        !            52: is associated with a 300 baud modem line,
        !            53: .IR /dev/cul0 ,
        !            54: while
        !            55: .I /dev/cua1
        !            56: is associated with a 1200 baud modem line,
        !            57: .IR /dev/cul1 .
        !            58: For devices such as the Quadracall which simulate multiple DN-11
        !            59: units, the minor device indicates which outgoing modem to use.
        !            60: .SH FILES
        !            61: .DT
        !            62: /dev/cua?      call units
        !            63: .br
        !            64: /dev/cul?      associated modem lines
        !            65: .SH "SEE ALSO"
        !            66: tip(1C)
        !            67: .SH DIAGNOSTICS
        !            68: Two error numbers are of interest at open time.
        !            69: .TP 10
        !            70: [EBUSY]
        !            71: The dialer is in use.
        !            72: .TP 
        !            73: [ENXIO]
        !            74: The device doesn't exist, or there's no power to it.

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