NetBSD-5.0.2/usr.sbin/isdn/isdntelctl/isdntelctl.8

.\" $NetBSD: isdntelctl.8,v 1.8 2003/04/06 18:20:14 wiz Exp $
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.\" Copyright (c) 1997, 1999 Hellmuth Michaelis. All rights reserved.
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.\"	$Id: isdntelctl.8,v 1.8 2003/04/06 18:20:14 wiz Exp $
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.\" $FreeBSD$
.\"
.\"	last edit-date: [Mon Dec 13 23:06:45 1999]
.\"
.Dd April 21, 1999
.Dt ISDNTELCTL 8
.Os
.Sh NAME
.Nm isdntelctl
.Nd control isdn4bsd telephone sound format conversion
.Sh SYNOPSIS
.Nm
.Op Fl c
.Op Fl g
.Op Fl u Ar unit
.Op Fl A
.Op Fl U
.Op Fl N
.Sh DESCRIPTION
.Nm
is part of the isdn4bsd package and is used to configure the sound format
conversion facilities of the /dev/isdntel interfaces.
.Pp
The following options are available:
.Bl -tag -width Ds
.It Fl c
Clear the telephone input queue.
.It Fl g
Get the sound format currently in use.
.It Fl u
Set the
.Pa /dev/isdntel
unit number.  The default value is zero to access
device
.Pa /dev/isdntel0 .
.It Fl A
Do A-law (ISDN line) -\*[Gt] mu-law (userland) conversion.
.It Fl U
Do mu-law (ISDN line) -\*[Gt] A-law (userland) conversion.
.It Fl N
Set sound conversion to do no format conversion.
.El
.Pp
The telephony data stream comes out of the line in a bit-reversed format,
so the
.Xr isdntel 4
driver does the bit-reversion process in any case.
.Pp
Additionally, the user can specify to do A-law to mu-law, mu-law to A-law
or no conversion at all in the isdntel driver by using the
.Nm
utility.
.Sh FILES
.Pa /dev/isdntel\*[Lt]n\*[Gt]
.Sh EXAMPLES
The command
.Bd -literal -offset indent
isdntelctl -g
.Ed
.Pp
displays the currently used sound format for device
.Pa /dev/isdntel0 .
.Sh SEE ALSO
.Xr isdntel 4 ,
.Xr isdnd.rc 5 ,
.Xr isdnd 8
.Sh STANDARDS
A-law and mu-law are specified in ITU Recommendation G.711.
.Sh AUTHORS
The
.Nm
utility and this man page were written by
.An Hellmuth Michaelis Aq hm@kts.org .