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freebsd/usr.sbin/i4b/man/i4bing.4

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.\"
.\" Copyright (c) 2000 Hellmuth Michaelis. All rights reserved.
.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" $Id: i4bing.4,v 1.1 2000/01/10 19:14:18 hm Exp $
.\"
.\" $FreeBSD$
.\"
.\" last edit-date: [Mon Jan 10 20:13:11 2000]
.\"
.Dd January 10, 2000
.Dt I4BING 4
.Os
.Sh NAME
.Nm i4bing
.Nd isdn4bsd NetGraph ISDN B-channel interface driver
.Sh SYNOPSIS
.Cd pseudo-device \&"i4bing\&" Op count
.Sh DESCRIPTION
The
.Nm
driver interfaces the FreeBSD NetGraph subsystem with the
isdn4bsd package.
.Pp
The driver just packs packets received from the NetGraph subsystem without
anything appended or prepended into raw HDLC packets on the B channel and
transfers them to a remote site.
Packets received from the remote site are queued into the NetGraph
subsystem
.Pp
The format of the resulting packet on the B channel is:
.Pp
.Dl (HDLC opening flag) (Packet) (CRC) (HDLC closing flag)
.Pp
In the case where a Packet for a remote site arrives in the driver and no
connection has been established yet, the driver communicates with the
.Xr isdnd 8
daemon to establish a connection.
.Pp
.Sh SEE ALSO
.Xr isdnd 8
.Xr isdnd.rc 5
.Xr netgraph 4
.Sh AUTHORS
The
.Nm
device driver and this manpage were written by
.An Hellmuth Michaelis Aq hm@kts.org .