NAME
isdntelctl
- control isdn4bsd telephone sound format conversion
SYNOPSIS
isdntelctl
[-c]
[-g]
[-u unit]
[-A]
[-U]
[-N]
DESCRIPTION
isdntelctl
is part of the isdn4bsd package and is used to configure the sound format
conversion facilities of the /dev/isdntel interfaces.
The following options are available:
- -c
-
Clear the telephone input queue.
- -g
-
Get the sound format currently in use.
- -u
-
Set the
/dev/isdntel
unit number. The default value is zero to access
device
/dev/isdntel0
.
- -A
-
Do A-law (ISDN line) -> mu-law (userland) conversion.
- -U
-
Do mu-law (ISDN line) -> A-law (userland) conversion.
- -N
-
Set sound conversion to do no format conversion.
The telephony data stream comes out of the line in a bit-reversed format,
so the
isdntel(4)
driver does the bit-reversion process in any case.
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
isdntelctl
utility.
FILES
/dev/isdntel<n>
EXAMPLES
The command
-
isdntelctl -g
displays the currently used sound format for device
/dev/isdntel0
.
SEE ALSO
isdntel(4),
isdnd.rc(5),
isdnd(8)
STANDARDS
A-law and mu-law are specified in ITU Recommendation G.711.
AUTHORS
The
isdntelctl
utility and this man page were written by
Hellmuth Michaelis <hm@kts.org>
.