ISDNTELCTL(8) BSD System Manager's Manual ISDNTELCTL(8)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>.
BSD April 21, 1999 BSD
Check Out this Related Man Page
mlib_SignaluLaw2ALaw(3MLIB) mediaLib Library Functions mlib_SignaluLaw2ALaw(3MLIB)NAME
mlib_SignaluLaw2ALaw - ITU G.711 m-law and A-law compression and decompression
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_SignaluLaw2ALaw(mlib_u8 *acode,
const mlib_u8 *ucode, mlib_s32 n);
DESCRIPTION
The mlib_SignaluLaw2ALaw() function performs ITU G.711 m-law and A-law compression and decompression in compliance with the ITU (formerly
CCITT) G.711 specification.
PARAMETERS
The function takes the following arguments:
acode A-law code array.
ucode m-law code array.
n Number of samples in the input array.
RETURN VALUES
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Committed |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO mlib_SignalALaw2Linear(3MLIB), mlib_SignalALaw2uLaw(3MLIB), mlib_SignalLinear2ALaw(3MLIB), mlib_SignalLinear2uLaw(3MLIB), mlib_Signalu-
Law2Linear(3MLIB), attributes(5)SunOS 5.11 2 Mar 2007 mlib_SignaluLaw2ALaw(3MLIB)
sir,
i came to know that telephone exchanges
use unix for the working of telephones,that is
when we take our hand set in telephone we
can note a dial sound,for this telephone exchanges
use unix.
we are going to do project using unix,i want to know
wheater we can able to connect... (1 Reply)
Hi all,
It will be very useful If you spare some time with me for this worrying error.
I am calling a conversion program which is written in C++ for converting a file format to different format. It was working fine for this past 2 yrs. But now it is not working since the file size has been... (1 Reply)
Hi,
I was wondering if any of you guys know of way to make applications that use sound device on linux to access it in a "non-exclusive manner", the aim is to be able to use more than one application that requires the sound device.
Thanks (0 Replies)
i have lots of files in /law/prod and /law/dev, such as AP20PD, AP20WS, AP20.scr, AP20.rpt
if i am in /law DIR
find . -name AP20PD, found in /law/prod and /law/dev
i want to head -1 AP20PD from both location and >> /tmp/test.log
can i use find and head in one line ?
----------... (1 Reply)
how do i modify the following:
echo "jaba law welcome no jaba law sorry now jaba law" | awk '{s+=gsub(/jaba law/,"jaba law")} END {print s}'
so that it shows me the actual phrase it found matching the strings i specified?
something like:
jaba law jaba law jaba law (4 Replies)
Does anyone know how to check if a .wav file is encoded with "A law" or "Mu law" in Linux and PC? I tried sox --i filename.wav on my PC, but I don't think it tell you if the file is A law or Mu law. Thanks. (2 Replies)