tip(1) no longer uses modems(5).
Reviewed by: markm Approved by: re
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.\" Copyright (c) 1983, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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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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.\" 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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.\" @(#)modems.5 3/24/95
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.\" $FreeBSD$
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.\"
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.Dd March 24, 1995
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.Dt MODEMS 5
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.Os
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.Sh NAME
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.Nm modems
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.Nd modem configuration data base
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.Sh DESCRIPTION
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The modems known by
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.Xr tip 1
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and their attributes are stored in an
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.Tn ASCII
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file which
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is structured somewhat like the
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.Xr termcap 5
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file. Each line in the file provides a description for a single
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.Em modem .
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Fields are separated by a colon (``:'').
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Lines ending in a \e character with an immediately following newline are
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continued on the next line.
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.Pp
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The first entry is the name(s) of the modem. If there is more
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than one name for a modem, the names are separated by vertical bars.
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After the name of the modem comes the fields of the description. A
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field name followed by an `=' sign indicates a string value follows. A field
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name followed by a `#' sign indicates a following numeric value.
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.Pp
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When
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.Xr tip 1
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is invoked, an entry for a remote system is looked up in the
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.Pa /etc/remote
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database.
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If the entry includes an "ACU" type capability (abbreviated at),
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.Xr tip 1
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looks up the specified modem in
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.Pa /etc/modems .
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If a modem entry is found,
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the corresponding capabilities determine how
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.Xr tip 1
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programs the modem when connecting to and disconnecting from the
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remote system.
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.Sh CAPABILITIES
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Capabilities are either strings (str), numbers (num), or boolean
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flags (bool). A string capability is specified by
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.Em capability Ns Ar = Ns Em value ;
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for example, ``reset_command=ATZ\\r''. A numeric capability is specified by
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.Em capability Ns Ar # Ns Em value ;
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for example, ``intercharacter_delay#50''. A boolean capability is specified
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by simply listing the capability.
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.Bl -tag -width intercharacter_delay
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.It Cm \&dial_command
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(str)
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AT command used to dial remote system (typically, "ATDT")
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.It Cm \&echo_off_command
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(str)
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AT command to turn off command echo.
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.It Cm \&escape_guard_time
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(num)
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The delay, expressed in milliseconds, used to frame return-to-command
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escape sequences.
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.It Cm \&escape_sequence
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(str)
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The return-to-command escape sequence.
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.It Cm \&hangup_command
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(str)
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AT command used to hangup modem.
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.It Cm \&hw_flow_control
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(bool)
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Enable hardware (RTS/CTS) flow control between computer and modem (DTE/DCE).
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.It Cm \&init_string
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(str)
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AT command used to initialize modem before dialing.
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.It Cm \&intercharacter_delay
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(num)
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Delay value, expressed in milliseconds, between characters when sending commands
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to the modem.
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.It Cm \&intercommand_delay
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(num)
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Minimum delay value, expressed in milliseconds, to impose between commands
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issued to the modem.
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.It Cm \&lock_baud
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(bool)
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Use a fixed bit rate between the computer and the modem (DTE / DCE). The
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bit rate is specified in
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.Pa /etc/remote .
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.It Cm \&reset_command
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(str)
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AT command to reset the modem.
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.It Cm \&reset_delay
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(num)
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The time, expressed in milliseconds, required by the modem to complete
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a reset and return to a ready condition.
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.El
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.Sh FILES
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.Bl -tag -width /etc/modems -compact
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.It Pa /etc/modems
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The
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.Nm
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configuration database file
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resides in
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.Pa /etc .
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.El
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.Sh SEE ALSO
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.Xr tip 1 ,
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.Xr remote 5
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.Sh HISTORY
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The
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.Nm
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file format appeared in
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.Bx 4.4 .
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