1 .\" $NetBSD: isdntelctl.8,v 1.7 2002/07/29 01:08:29 wiz Exp $
3 .\" Copyright (c) 1997, 1999 Hellmuth Michaelis. All rights reserved.
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26 .\" $Id: isdntelctl.8,v 1.8 2003/04/06 18:20:14 wiz Exp $
30 .\" last edit-date: [Mon Dec 13 23:06:45 1999]
37 .Nd control isdn4bsd telephone sound format conversion
48 is part of the isdn4bsd package and is used to configure the sound format
49 conversion facilities of the /dev/isdntel interfaces.
51 The following options are available:
54 Clear the telephone input queue.
56 Get the sound format currently in use.
60 unit number. The default value is zero to access
64 Do A-law (ISDN line) -\*[Gt] mu-law (userland) conversion.
66 Do mu-law (ISDN line) -\*[Gt] A-law (userland) conversion.
68 Set sound conversion to do no format conversion.
71 The telephony data stream comes out of the line in a bit-reversed format,
74 driver does the bit-reversion process in any case.
76 Additionally, the user can specify to do A-law to mu-law, mu-law to A-law
77 or no conversion at all in the isdntel driver by using the
81 .Pa /dev/isdntel\*[Lt]n\*[Gt]
84 .Bd -literal -offset indent
88 displays the currently used sound format for device
95 A-law and mu-law are specified in ITU Recommendation G.711.
99 utility and this man page were written by
100 .An Hellmuth Michaelis Aq hm@kts.org .