In telephone systems, the use of signals and techniques to perform system management functions, such as system control, addressing, routing, error detection and correction, level control, priority, traffic control, message accountability, and other overhead functions that may be described in system overhead portions of messages. [From Weik '89]

The continued provision of services and material necessary for the use and improvement of a system during its life cycle.

The part of operating time during which a functional unit is tested for proper operation.
Note: In a computer, the system test time may include the time for testing programs belonging to the operating system.

Synonym system analysis.

In a communications system, the control and implementation of a set of functions that (a) prevent or eliminate degradation of any part of the system, (b) initiate immediate response to demands that are placed on the system, (c) respond to changes in the system to meet long range requirements, and (d) may include various subfunctions, such as (i) immediate circuit… (Read More →)

1. A process of defining the hardware and software architecture, components, modules, interfaces, and data for a system to satisfy specified requirements.
2. The preparation of an assembly of methods, procedures, or techniques united by regulated interaction to form an organized whole. [JP1]

See systems design.

Abbreviation for tera (1012). See International System of Units.

See series T junction.

In Integrated Services Digital Networks (ISDN), the conceptual point dividing NT2 and NT1 functional groupings in a particular ISDN arrangement.