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wiz 2001-04-04 10:06:45 +00:00
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commit efe5fa7706
1 changed files with 21 additions and 21 deletions
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42
share/man/man4/i4btel.4
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@ -22,7 +22,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $Id: i4btel.4,v 1.1.1.1 2001/01/05 15:43:17 martin Exp $
.\" $Id: i4btel.4,v 1.2 2001/04/04 10:06:45 wiz Exp $
.\"
.\" $FreeBSD$
.\"
@ -55,12 +55,12 @@ Functionality one is used to enable commands to dial out and hang up and
receive responses about the state of the dial out progress and status.
This commands may change in the future, for details see the file
.Em i4b_tel_ioctl.h
and the
and the
.Xr isdnphone 1
utility.
.Pp
The telephony data stream comes out of the line in a bit-reversed format,
so the
so the
.Nm
driver does the bit-reversion process in any case.
.Pp
@ -85,38 +85,38 @@ parameters are available:
.Pp
.Bl -tag -width Ds -compact -offset indent
.It Ar CVT_NONE
do no A-law/u-law audio format conversion. The conversion path looks like
this:
do no A-law/u-law audio format conversion. The conversion path looks like
this:
.Pp
USER <--> bitreversing <--> ISDN-line
.Pp
.It Ar CVT_ALAW2ULAW
set set audio format conversion to do an audio conversion from A-law
(on the ISDN line) to u-law (in the userland).
The
set set audio format conversion to do an audio conversion from A-law
(on the ISDN line) to u-law (in the userland).
The
.Xr read 2
conversion path looks like this:
conversion path looks like this:
.Pp
USER <-- u-law/A-law <-- bitreversing <-- ISDN-line
.Pp
and the
and the
.Xr write 2
conversion path looks like this:
conversion path looks like this:
.Pp
USER --> u-law/A-law --> bitreversing --> ISDN-line
.Pp
.It Ar CVT_ULAW2ALAW
set set audio format conversion to do an audio conversion from u-law
set set audio format conversion to do an audio conversion from u-law
(on the ISDN line) to A-law (in the userland).
The
The
.Xr read 2
conversion path looks like this:
conversion path looks like this:
.Pp
USER <-- A-law/u-law <-- bitreversing <-- ISDN-line
.Pp
and the
and the
.Xr write 2
conversion path looks like this:
conversion path looks like this:
.Pp
USER --> A-law/u-law --> bitreversing --> ISDN-line
.Pp
@ -124,13 +124,13 @@ USER --> A-law/u-law --> bitreversing --> ISDN-line
.Sh STANDARDS
A-Law and u-Law are specified in ITU Recommendation G.711.
.Sh SEE ALSO
.Xr g711conv 1 ,
.Xr isdnphone 1 ,
.Xr isdnd.rc 5 ,
.Xr isdnd 8 ,
.Xr isdntelctl 8
.Xr g711conv 1
.Xr isdnphone 1
.Xr isdnd 8
.Xr isdnd.rc 5
.Sh AUTHOR
The
.Nm
device driver and this manpage were written by
device driver and this manpage were written by
.An Hellmuth Michaelis Aq hm@kts.org .