[an error occurred while processing this directive]
out-of-band
![[prev]](../gif/left.gif)
![[up]](../gif/up.gif)
![[next]](../gif/right.gif)
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.
Return to Cool Jargon of the Day