isdntelctl(8)
NAME
- isdntelctl - control isdn4bsd telephone sound format conver
- sion
SYNOPSIS
isdntelctl [-c] [-g] [-u unit] [-A] [-U] [-N]
DESCRIPTION
- The isdntelctl utility is part of the isdn4bsd package and
- is used to
configure the sound format conversion facilities of the - /dev/i4btel
interfaces. - The following options are available:
- -c Clear the telephone input queue.
- -g Get the sound format currently in use.
- -u Set the /dev/i4btel unit number. The default value
- is zero to
- access device /dev/i4btel0.
- -A Do A-law (ISDN line) -> u-law (userland) conversion.
- -U Do u-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-re
- versed format,
so the i4btel(4) driver does the bit-reversion process in - any case.
- 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 - isdntelctl
utility.
FILES
/dev/i4btel<n>
EXAMPLES
- The command:
- isdntelctl -g
- displays the currently used sound format for device
- /dev/i4btel0.
SEE ALSO
g711conv(1), i4btel(4), isdnd.rc(5), isdnd(8)
STANDARDS
A-Law and u-Law are specified in ITU Recommendation G.711.
AUTHORS
- The isdntelctl utility and this manpage were written by
- Hellmuth
Michaelis <hm@kts.org>. - BSD April 21, 1999