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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.
+.\"
+.\"	$Id: isdnd.rates.5,v 1.6 1998/12/05 18:03:21 hm Exp $ 
+.\"
+.\"     last edit-date: [Sat Dec  5 18:09:57 1998]
+.\"
+.Dd September 11, 1998
+.Dt isdnd.rates 5
+.Sh NAME
+.Nm isdnd.rates
+.Nd isdn4bsd ISDN management daemon rates description file
+.Sh DESCRIPTION
+The file
+.Pa isdnd.rates
+contains descriptions how long charging units last at a given time of day,
+day of week and the distance to the destination. If this file is available,
+this information may be used by the
+.Xr isdnd 8
+ISDN connection management daemon to calculate the short hold time for a 
+connection.
+.Pp
+The format of a rate entry line is a follows:
+.Pp
+The first field, the
+.Pq Fa rate-code
+defines a collection of rates (for each day of the week) which can be 
+referenced in the
+.Xr isdnd 8
+configuration file
+.Xr isdnd.rc 5 .
+This field must start with the identifier
+.Dq ra
+followed by a digit in the range of zero to four.
+.Pp
+
+The second field, the
+.Pq Fa day-number
+selects the day of week for which this entry defines the rates, where 0 stands
+for Sunday, 1 for Monday and so on until the digit 6 which stands for Saturday.
+.Pp
+
+The rest of the line consists of one or more space separated fields which have
+the following syntax:
+.Bd -filled -offset indent
+start_hour.start_minutes-end_hour.end_minutes:charge_unit_length
+.Ed
+.Pp
+Start_hour and start_minutes define the begin of a time section and end_hour
+and end_minutes define the end. Charge_unit_length define the length of a
+charging unit in the previously defined time section. No spaces or tabs are
+allowed inside this field. The hour and minutes specifications MUST have
+exactly 2 digits, in case just one digit is needed, a leading 0 must be used.
+.Pp
+For example,
+.Bd -filled -offset indent
+14.00-18.00:90
+.Ed
+.Pp
+defines, that between 2:00 PM and 6:00 PM the length of one charging unit
+lasts 90 seconds.
+.Pp
+
+.Sh FILES
+.Bl -tag -width /etc/isdn/isdnd.rates -compact
+.It Pa /etc/isdn/isdnd.rates
+The default rates specification file for the
+.Nm isdnd
+ISDN daemon.
+
+.Sh EXAMPLES
+The line:
+.Bd -literal
+ra0 0 00.00-05.00:240 05.00-21.00:150 21.00-24.00:240
+.Ed
+.Pp
+defines the unit lengths for a Sunday.
+
+.Sh SEE ALSO
+.Xr isdnd 8 ,
+.Xr isdnd.rc 5
+
+.Sh AUTHOR
+The rates subsystem for the
+.Xr isdnd 8
+daemon to which
+.Nm
+belongs was designed and written by Gary Jennejohn.
+.Pp
+The
+.Xr isdnd 8
+daemon and this manual page were written by Hellmuth Michaelis.
+He can be reached at hm@kts.org or hm@hcs.de.
+