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+.\"
+.\" Copyright (c) 1997, 1998 Hellmuth Michaelis. All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	last edit-date: [Sat Dec  5 18:16:19 1998]
+.\"	
+.\"	$Id: isdntel.8,v 1.6 1998/12/05 18:03:58 hm Exp $
+.\"
+.Dd July 11, 1998
+.Dt isdntel 8
+.Sh NAME
+.Nm isdntel
+.Nd isdn4bsd telephone answering management utility
+.Sh SYNOPSIS
+.Nm isdntel
+.Op Fl a Ar aliasfile
+.Op Fl d Ar spooldir
+.Op Fl p Ar playcommand
+.Op Fl t Ar timeout
+.Sh DESCRIPTION
+.Nm
+is used to provide an "answering machine" functionality for incoming
+telephone voice messages.
+.Pp
+The following options are supported:
+.Bl -tag -width Ds
+.It Fl a
+Use 
+.Ar aliasfile
+as the pathname for an aliasfile containing aliases for phone numbers. The
+default path is
+.Em /etc/isdn/isdntel.alias .
+The format of an alias entry is the number string followed by one or more
+spaces or tabs. The rest of the line is taken as the alias string. Comments
+are introduced by a leading blank, tab or "#" character.
+.It Fl d
+Use
+.Ar spooldir
+as the directory where the incoming voice messages are stored by the
+"answ" script called by 
+.Xr isdnd 8 .
+This defaults to the directory
+.Em /var/isdn .
+The format of a voice message filename is:
+.Pp
+.Dl YYMMDDhhmmss-dest_number-source_number-length_in_secs
+.It Fl p
+Use
+.Ar playcommand
+as the command string to execute for playing a voice message to some audio
+output facility. The characters
+.Em %s
+are replaced by the currently selected filename. The default string is
+.Em cat %s | alaw2ulaw >/dev/audio
+.It Fl t
+The value for
+.Ar timeout
+specifies the time in seconds the program rereads the spool directory
+when there is no keyboard activity.
+.El
+.Pp
+The screen output should be obvious. If in doubt, consult the source.
+.Sh SEE ALSO
+.Xr isdnd 8
+.Xr isdnd.rc 5
+.Xr i4btel 4
+
+.Sh BUGS
+Still two or more left.
+
+.Sh AUTHOR
+The
+.Nm
+utility and this manual page were written by Hellmuth Michaelis (hm@kts.org)