A violation of computer security whereby data have been made available to unauthorized entities. [2382-pt.8]

See biconical antenna.

In telephony, the disassociation or release of a switched circuit between two stations.

In Link-Layer protocols, such as high-level data link control (HDLC), synchronous data link control (SDLC), and advanced data communication control procedure (ADCCP), an unnumbered command used to terminate the operational mode previously set.

In a switched telephone network, a supervisory signal transmitted from one end of a user line or trunk to indicate at the other end that the established connection should be disconnected.

In a power system, a switch used for closing, opening, or changing the connections in a circuit or system or for purposes of isolation.
Note: It has no interrupting rating and is intended to be operated only after the circuit has been opened by some other means, such as by a circuit breaker or variable transformer.

The timing of the period during which a hang-up signal is being received from the called end office and an off-hook signal is being received from the calling end office. [T1.104-1991]

The switching entity that performs disconnect timing and that decides when the connection is to be cleared. It is usually the calling end office; however, it may be another switching entity such as an office performing centralized automatic message accounting (CAMA) or an operator service system. [T1.104-1988]

1. [A] means of restricting access to objects based on the identity and need-to-know of users and/or groups to which the object belongs. Controls are discretionary in the sense that a subject with a certain access permission is capable of passing that permission (directly or indirectly) to any other subject. Synonym surrogate access. [INFOSEC-99].
2. Access control based on access… (Read More →)

The part of an FM receiver that extracts the desired signal from an incoming FM wave by changing frequency variations into amplitude variations.