NetBSD/usr.sbin/isdn/isdntelctl/isdntelctl.8
martin fbf08005d7 Import of essential ISDN4BSD userland utilities and their documentation.
The left out parts (which have not been installed by ISDN4BSD on NetBSD
anyway), may be added as pkgs later (if demand exists).
2001-01-06 13:00:10 +00:00

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.\" Copyright (c) 1997, 1999 Hellmuth Michaelis. All rights reserved.
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.\" $Id: isdntelctl.8,v 1.1.1.1 2001/01/06 13:00:34 martin Exp $
.\"
.\" $FreeBSD$
.\"
.\" 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 isdntelctl
is part of the isdn4bsd package and is used to configure the sound format
conversion facilities of the /dev/i4btel 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 /dev/i4btel unit number. The default value is zero to access
device /dev/i4btel0.
.It Fl A
Do A-law (ISDN line) -> u-law (userland) conversion.
.It Fl U
Do u-law (ISDN line) -> 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 i4btel 4
driver does the bit-reversion process in any case.
.Pp
Additionally, the user can specify to do A-law to u-law, u-law to A-law
or no conversion at all in the i4btel driver by using the
.Nm
utility.
.Pp
.Sh FILES
/dev/i4btel<n>
.Sh STANDARDS
A-Law and u-Law are specified in ITU Recommendation G.711.
.Sh EXAMPLES
The command:
.Bd -literal -offset indent
isdntelctl -g
.Ed
.Pp
displays the currently used sound format for device /dev/i4btel0.
.Sh SEE ALSO
.Xr i4btel 4
.Xr g711conv 1
.Xr isdnd 8
.Xr isdnd.rc 5
.Sh AUTHOR
The
.Nm
utility and this manpage were written by
.An Hellmuth Michaelis Aq hm@kts.org .