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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: i4btrc.4,v 1.5 1998/12/05 18:06:13 hm Exp $
+.\"
+.\"	last edit-date: [Sat Dec  5 18:39:42 1998]
+.\"
+.Dd February 3, 1998
+.Dt i4btrc 4
+.Sh NAME
+.Nm i4btrc
+.Nd isdn4bsd ISDN interface driver for D and B channel tracing
+.Sh FreeBSD SYNOPSIS
+.Cd pseudo-device \&"i4btrc\&" Op count
+.Sh NetBSD SYNOPSIS
+none
+.Sh DESCRIPTION
+The
+.Nm
+driver is used to add a header to the data got from the D and/or B channel
+and queues it to be read and further processed by the
+.Xr isdntrace 8
+utility.
+.Sh SEE ALSO
+.Xr isdnd 8
+.Xr isdntrace 8
+.Sh AUTHOR
+The
+.Nm
+device driver and this manpage were written by Hellmuth Michaelis. He can be
+contacted at hm@kts.org.