Glossary, Acronyms, and Abbreviations - IIUSA

GPSR - Global Positioning System receiver
GPSS - general purpose simulation system
GRACE - generic reusable Ada components for engineering
Grade Of Service - This is simply the ratio of calls blocked to total
calls in a decimal form. So a grade of service of P.08 would
represent 8% blocking. Telephone tariffs regulate the acceptable
average grade of service which must be provided on public
networks.
GRASP - graphical system for presentation
GRCS - guardrail common sensor
GRE - graphics engine
GRNN - general regression neural network
Ground Start - A method of signaling between two machines, where
one machine grounds one side of the line and the other machine
detects the presence of the ground.
Ground Start Trunk - A type of telephone trunk where the request
to make an outgoing call (i.e. request for dial tone) is made by
briefly grounding the Tip conductor. Many PBX systems use
ground start trunks as they are less prone to glare than Loop start
trunks. See Loop Start Trunk. See also Glare
GRT - ground receive terminal
GRWSIM - ground warfare simulation
GS - general support
GSA - General Services Administration
GSA - global security architecture
GSB - gateway signaling buffer
GSE - ground support equipment
GSII - Government Services Information Infrastructure
GSM - global system mobile (Europe)
GSM - ground station module
GSM - groupe speciale mobile
GSORTS - global status of resources and training system
GSPM - Global Standard Profile Matrix
GSR - ground surveillance radar
GSRD - Ground Start Ringdown
GSS - general security support (DOD)
GSSAP - generic security service applications programming
GSSP - Generally Accepted System Security Principles
GSTS - Ground-based surveillance and tracking system
GSVS - global secure voice system
GT - Guard Time
GTA - graphic training aid
GTACS - ground theater air control system
GTE - General Telephone and Electric
GTEAM - Global Team Labeling
GTFM - generalized tamed frequency modulation
GTIS - Government Telecommunications and Information Services
(Canada)
GTL - gunning transceiver logic
GTLD - Generic Top Level Domains
GTN - Global Transportation Network (DOD)
GTS - government telecommunications system
GUI - graphical user interface
GVM - global virtual manufacturing
GW - gateway
GWC - global weather central
GWIP - global weather intercept program
GWS - groupware server
GWS - GroupWare Server
GXX - format for a user's telephone number, 4/3 numbering plan
GXXX - format for a user's telephone number, 3/4 numbering plan
H
H-HMMWV - high variant HMMWV
H - height
H.gcp - gateway control protocol
HACMP - high availability clustered multiprocessing
HAEMP - High Altitude Electromagnetic Pulse
HAG - high assurance guard
HAIDE - hostile aircraft identification equipment
HAL - hard array logic
HAL - hardware adaptation (abstraction) layer
HAL - house programmed array logic
Half-Duplex - Transmission occurs in two directions, but not
simultaneously.
Handshake - Exchange of predetermined signals occurring when
the connection between two data sets is first established.
HARM - high speed anti-radiation missile
HBA - host bus adapter
HCI - human/computer interface
HCJ - heliborne common jammer
HCLOS - high capacity line of sight
HCP - hardcopy printer
HCTR - High-Capacity Trunk Radio
HCU - high capacity computer unit
HCU-2 - high capacity unit-2
HD - hard disk
HD - harmonic distortion
HDA - head disk assembly
HDA - host data adapter
HDB3 (High Density Bipolar, 3 Zero) - A CCITT recommended
BNZS coding format. This commonly used version of high-density
bipolar (HDB) line coding replaces strings of four zeroes with
sequences containing a bipolar violation in the fourth-bit position.
Since this coding format precludes strings of zeroes greater than
three, it is referred to as HDB3. The encoding algorithm is
basically the same as B3ZS. HDB3 line coding is used in CEPT
Level-1 digital transmission (2.048 Mbps); thus HDB3 is used with
the CEPT Trunk module. Also see zero suppression.
HDB3 - High Density Bipolar 3. An E1 line coding method. This is the
more modern line coding method of the two commonly available.
See Line Coding, T1. See also AMI and B8ZS
Page 46 of 106