| slovo | definícia |
out-of-band
(foldoc) | out-of-band
1. The exchange of call control information
on a dedicated channel, separate from that used by the
telephone call or data transmission.
2. Sometimes used to describe what communications people call
"shift characters", such as the ESC that leads control
sequences for many terminals, or the level shift indicators in
the old 5-bit Baudot codes.
3. In personal communication, using methods other than
electronic mail, such as telephone or snail-mail.
4. Values returned by a function that are not in
its "natural" range of return values, but rather signal some
kind of exception. Many C functions that normally return
a non-negative integer return -1 to indicate failure.
This use confuses "out-of-band" with "out-of-range". It is
actually a clear example of in-band signalling since it uses
the same "channel" for control and data.
Compare hidden flag, green bytes, fence.
[Jargon File]
(2001-04-08)
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out-of-band
(jargon) | out-of-band
adj.
[from telecommunications and network theory]
1. In software, describes values of a function which are not in its
‘natural’ range of return values, but are rather signals that some kind of
exception has occurred. Many C functions, for example, return a nonnegative
integral value, but indicate failure with an out-of-band return value of
−1. Compare hidden flag, green bytes, fence.
2. Also sometimes used to describe what communications people call shift
characters, such as the ESC that leads control sequences for many
terminals, or the level shift indicators in the old 5-bit Baudot codes.
3. In personal communication, using methods other than email, such as
telephones or snail-mail.
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