out-of-band

(redirected from Out-of-band signaling)
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out-of-band

(communications)
The exchange of call control information on a dedicated channel, separate from that used by the telephone call or data transmission.

out-of-band

(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.

out-of-band

(3)
In personal communication, using methods other than electronic mail, such as telephone or snail-mail.

out-of-band

(software)
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.

out-of-band

(1) Separate from the primary frequency or system. See signaling in/out-of-band and out-of-band data.

(2) Not at the regular time. See out-of-band patch.
References in periodicals archive ?
When AT&T switched to out-of-band signaling, where the signals are carried on a separate band than the voice, the phone hacking was eliminated overnight.
The first design-win features SBE's HighWire CompactPCI T1/E1 intelligent controller (HW400c/R), used in a fault tolerant telephony Softswitch application running the company's SS7 MTP2 protocol for out-of-band signaling.
Moreover, the additional bandwidth margin enables backplane designers to perform high-speed chip-to-chip bit-blasting in addition to permitting additional out-of-band signaling across the XAUI links," commented Kopec.
Verint has developed all of the capabilities required by the "punch list", including Dialed Digit Extraction, In-Band and Out-of-Band Signaling Information and Party Hold/Join/Drop Messages.
Separation of data plane and control plane topologies to support the out-of-band signaling requirements of optical networks.
For example, ITU-T C7, the international standard for out-of-band signaling for telephony networks, is not compatible with SS7 signaling used in North America.
SS7/MTPL2 is an international standard that defines protocols for out-of-band signaling for wireless and wireline call setup, routing, control and Intelligent Network (IN) functions.