A device that responds to a physical stimulus, such as thermal energy, electromagnetic energy, acoustic energy, pressure, magnetism, or motion, by producing a signal, usually electrical.

See flag.

Signaling in which the whole or a part of one or more channels in a multichannel system is used to provide for supervisory and control signals for the message traffic channels.
Note: The same channels, such as frequency bands or time slots, that are used for signaling are not used for message traffic.

The concept of keeping information of different security classes apart in a system [CESG].
Note: Separation may be implemented by temporal, physical, logical or cryptographic techniques

In secure communications, dividing responsibility for sensitive information so that no individual acting alone can compromise the security of the data processing system. [2382-pt.8]

The process by which telecommunication property costs, revenues, expenses, taxes, and reserves are apportioned among the operations. [47 CFR Pt.36-A]

A byte composed of seven binary elements. Synonym seven-bit byte.

An arrangement of items according to a specified set of rules, for example, items arranged alphabetically, numerically, or chronologically.

In a packet, a field of the packet header that is used by the terminating endpoint to determine if the packets arrive in sequence. [T1.509-1995]

Synonym serial access.