Word:

out-of-band

1.(communications)out-of-band - The exchange of call control information on a dedicated channel, separate from that used by the telephone call or data transmission.
2.out-of-band - 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.out-of-band - In personal communication, using methods other than electronic mail, such as telephone or snail-mail.
4.(software)out-of-band - 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.
Browse
out of use
out of view
out of wedlock
out of whack
out of work
out or keeping
Out patient
out to
Out to out
Out upon!
Out West
out-and-out
out-and-outer
out-basket
Out-Herod
out-migration
-- out-of-band --
out-of-body experience
out-of-bounds
out-of-breath
out-of-court settlement
out-of-date
out-of-door
out-of-doors
out-of-pocket
out-of-school
out-of-sight
out-of-the-box thinking
out-of-the-ordinary
Out-of-the-way
out-of-town
Out-patient
out-tray
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