Nickname for the United States Department of Defense "Trusted Computer System Evaluation Criteria", DOD
520
0. 28-STD [CESG]. Also known as "TCSEC"

The path, relative to a specified frame of reference, described by the center of mass of a satellite or other object in space subjected primarily to natural forces, mainly the force of gravity. [NTIA] [RR]

The process of describing the past, present, or predicted position of a satellite in terms of orbital parameters. [JP 1-02]

The number of independently fading propagation paths or frequencies, or both, used in diversity reception.

The OBF provides a forum for representatives from the telecommunications industry to identify, discuss, and resolve national issues that affect ordering, billing, provisioning, and exchange of information about access service, other connectivity, and related matters.

A voice or data circuit used by technical control and maintenance personnel for coordination and control actions relative to activation, deactivation, change, rerouting, reporting, and maintenance of communication systems and services. Synonyms engineering channel, engineering orderwire, service channel.

A multiplex carrier set specifically designed for the purpose of carrying orderwire traffic, as opposed to one designed for carrying mission traffic.

See birefringence.

See splice organizer.

The connection between the termination of a user-network interface and an operator service access point that is used for communication between the user and the operator service. [T1.661-1997]