.\"
.\" Copyright (c) 2000 Hellmuth Michaelis. All rights reserved.
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.\" $FreeBSD: src/usr.sbin/i4b/man/ihfc.4,v 1.7.2.1 2001/08/10 23:28:43 obrien Exp $
.\" $DragonFly: src/usr.sbin/i4b/man/ihfc.4,v 1.4 2006/02/17 19:40:15 swildner Exp $
.\"
.\"	last edit-date: [Fri Jan 12 09:54:31 2001]
.\"
.Dd January 12, 2001
.Dt IHFC 4
.Os
.Sh NAME
.Nm ihfc
.Nd isdn4bsd Cologne Chip Designs HFC[-S][-SP] 2B[DS0] driver
.Sh SYNOPSIS
All PnP cards (AcerISDN P10, Teles 16.3c PnP),
.Dx Ns ,
.Fx
4.x/5.x:
.Cd "device ihfc"
.Pp
Non-PnP cards (TELEINT ISDN SPEED No.1):
.Pp
.Fx
4.x:
.Cd "device ihfc0 at isa?"
.Pp
.Dx Ns , Fx
5.x:
.Cd "device ihfc"
NOTE:
.Li hint.ihfc.0.at="isa"
must be added to
.Pa /boot/device.hints
.Pp
NOTE: The driver will automatically probe for io-base and irq.
.Sh DESCRIPTION
The
.Nm
driver provides D-channel layer 1 supports as specified in ITU Recommendation
I.430 and layer 1 support for the B-channel.
.Pp
The driver supports passive ISA ISDN cards based on the HFC[-S][-SP] 2B[DS0]
chips from Cologne Chip Designs such as the Teles 16.3c and
the AcerISDN P10.
.Sh CAVEATS
The driver is still in a somewhat experimental state.
.Sh SEE ALSO
.Xr i4bq921 4 ,
.Xr i4bq931 4
.Sh STANDARDS
CCITT Recommendation I.430
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Hans Petter Selasky Aq hselasky@c2i.net .
.Pp
This manpage was written by
.An Hellmuth Michaelis Aq hm@FreeBSD.org .
.Sh BUGS
Always at least one left.