Acronym for Government Open Systems Interconnection Profile. A definition of Federal Government functional requirements for open systems computer network products, including a common set of Open System Interconnection (OSI) data communication protocols that enables systems developed by different vendors to interoperate and enable the users of different applications on these systems to exchange information.
Note 1: The OSI protocols were… (Read More →)

Government Emergency Telecommunications Service (GETS) is a federal government telecommunications service that currently provides National Security and Emergency Preparedness (NS/EP) users with priority voice and voiceband data communications during periods of emergency or crisis. GETS uses existing features and services of the Public Switched Network (PSN) with NS/EP augmentations and enhancements. Access is authorized to GETS using a calling card… (Read More →)

See GOSIP.

Abbreviation for general purpose interface. An equipment-interface device (usually computer equipment) with some number of digital lines, usually a multiple of eight, which may be used for input, output, or both, depending on the function.
Note: The digital lines may be individually controlled, although nothing precludes using them in combination.

Gigabit Passive Optical Network

General Packet Radio Service

Global Positioning System

Degradation of a system in such a manner that it continues to operate, but provides a reduced level of service rather than failing completely.

1. The probability of a call's being blocked or delayed more than a specified interval, expressed as a decimal fraction.
Note: Grade of service may be applied to the busy hour or to some other specified period or set of traffic conditions. Grade of service may be viewed independently from the perspective of incoming versus outgoing calls, and is not… (Read More →)

An optical fiber with a core having a refractive index that decreases with increasing radial distance from the fiber axis.
Note: The most common refractive index profile for a graded-index fiber is very nearly parabolic. The parabolic profile results in continual refocusing of the rays in the core, and compensates for multimode distortion.