| AARTS |
automatic audio remote
test set ACA automatic circuit assurance |
| ACC |
automatic callback
calling |
| ACD |
automatic call
distributor |
| ACTS |
Advanced Communications
Technology Satellite |
| ACU |
automatic calling
unit |
| ADCCP |
Advanced Data
Communication Control Procedures |
| ADP |
automatic data
processing |
| ADPE |
automatic data
processing equipment |
| ADSL |
Asynchronous Digital Subscriber
Line - Further info in
Technical Archive. |
| AECS |
Aeronautical Emergency
Communications System [Plan] AIN advanced intelligent network |
| AIS |
automated information
system |
| AMPS |
Advanced Mobile Phone
Service (USA analog cellular standard) |
| AMSC |
American Mobile
Satellite Corporation |
| AMTS |
automated maritime
telecommunications system |
| ANSI |
American National
Standards Institute |
| APCO |
Association of Public
Communications Officers (USA) |
| ATDM |
asynchronous
time-division multiplexing |
| AUI |
attachment unit
interface |
| AUTODIN |
Automatic Digital
Network |
| AUTOSEVOCOM |
Automatic Secure Voice
Communications Network |
| AUTOVON |
Automatic Voice
Network |
| AVD |
alternate
voice/data |
| C/kT |
carrier-to-receiver
noise density CLASS custom local area signaling service COMINT communications
intelligence |
| C3I |
command, control,
communications and intelligence |
| CAMA |
centralized automatic
message accounting |
| CCA |
carrier-controlled
approach |
| CCD |
charge-coupled
device |
| CDMA |
Code-Division Multiple
Access. Further info in Technical Archive. |
| CDPC |
Cellular Digital Packet
Data (for AMPS networks) |
| CDT |
control data
terminal |
| CDU |
central display
unit |
| COMSAT |
Communications Satellite
Corporation |
| COMSEC |
communications
security |
| CONEX |
connectivity
exchange |
| CSC |
circuit-switching
center |
| CSC |
common signaling
channel |
| CSMA |
carrier sense multiple
access |
| CSMA/CA |
carrier sense multiple
access with collision avoidance |
| CSMA/CD |
carrier sense multiple
access with collision detection |
| CX |
composite
signaling |
| D-AMPS |
Digital Advanced Mobile
Phone Service (USA standard), also known as IS-136 TDMA |
| DataTAC* |
Motorola standard for
wireless packet data networks |
| DECT |
Digital Enhanced
Cordless Telephony (using TDMA) |
| DME |
distance measuring
equipment |
| DMS |
Defense Message
System |
| DNIC |
data network
identification code |
| DNPA |
data numbering plan
area |
| DNS |
Domain Name
System |
| DO |
design
objective |
| DPCM |
differential pulse-code
modulation |
| DPCS |
Digital Personal
Communication Device |
| DPSK |
differential phase-shift
keying |
| DQDB |
distributed-queue
dual-bus [network] |
| DRAM |
dynamic random access
memory |
| DRSI |
destination station
routing indicator |
| DS |
digital
signal |
| DS0 |
digital signal
0 |
| DS1 |
digital signal
1 |
| DS1C |
digital signal
1C |
| DS2 |
digital signal
2 |
| DS3 |
digital signal
3 |
| DS4 |
digital signal
4 |
| DSA |
dial service
assistance |
| DSB |
double-sideband
[transmission] |
| DSB-RC |
double-sideband reduced
carrier transmission |
| DSB-SC |
double-sideband
suppressed-carrier transmission |
| DSCS |
Defense Satellite
Communications System |
| DSE |
data switching
exchange |
| DSI |
digital speech
interpolation |
| DTN |
data transmission
network |
| DTS |
Diplomatic
Telecommunications Service |
| DTU |
data transfer
unit |
| DTU |
data tape
unit |
| DTU |
digital transmission
unit direct to user |
| DTU |
data transfer
unit |
| DVL |
direct voice
link |
| EIA |
Electronic Industries
Association |
| ELINT |
electronics intelligence
electromagnetic intelligence |
| ERMES |
Enhanced Radio Message
System |
| ETSI |
European
Telecommunications Standard Institute |
| EXCSA |
Exchange Carriers
Standards Association |
| FCC |
Federal Communications
Commission (USA) |
| FCS |
frame check
sequence |
| FDDI |
fibre distributed data
interface |
| FDDI-2 |
fiber distributed data
interface-2 |
| FDHM |
full duration at half
maximum |
| FDM |
frequency-division
multiplexing |
| FDMA |
Frequency Division
Multiple Access |
| FDX |
full duplex |
| FEC |
forward error
correction |
| FEC |
forward error
correction |
| FECC |
Federal Emergency
Communications Coordinators |
| FOT |
frequency of optimum
traffic |
| FOT |
frequency of optimum
transmission |
| FPLMTS |
Future Personal Land
Mobile Telecommunications Service |
| FSDPSK |
filtered symmetric
differential phase-shift keying |
| FSK |
frequency-shift
keying |
| FT |
fibre optic
T-carrier |
| FTP |
file transfer
protocol |
| FTS |
Federal
Telecommunications System |
| FTS2000 |
Federal
Telecommunications System 2000 |
| FTSC |
Federal
Telecommunications Standards Committee |
| GII |
Global Information
Infrastructure |
| GPRS |
General Packet Radio
Services (GSM). Further info in Technical
Archive. |
| GPS |
Global Positioning
System. Further info in Technical
Archive. |
| GSM |
Global System for Mobile
Communications. Usually refers to the European standard GSM operating on 900
Mhz and 1800 Mhz bands, but in North America refers to the 1900 Mhz
band. |
| GSM
1800 |
GSM networks operating
in the 1.8 GHz band (also known as PCS 1900) |
| GSM
1900 |
GSM networks operating
in the 1.9 GHz band (also known as PCS 1900). Primarily in North
America |
| GSM
900 |
GSM networks operating
in the 900 Mhz band |
| GSTN |
general switched
telephone network |
| GTP |
Government
Telecommunications Program |
| GTS |
Government
Telecommunications System |
| HDLC |
high-level data link
control |
| HF |
high
frequency |
| HSCSD |
High Speed Circuit
Switched Data (GSM) |
| I/O |
input/output
[device] |
| IC |
integrated
circuit |
| ICI |
incoming call
identification |
| ICNI |
Integrated
Communications, Navigation, and Identification |
| IDN |
integrated digital
network |
| IIR |
infinite impulse
response |
| IMD |
intermodulation
distortion |
| IMP |
interface message
processor |
| IN |
intelligent
network |
| IN/1, IN/1+,
IN/2 |
intelligent network
concepts |
| INFOSEC |
information systems
security |
| INS |
inertial navigation
system |
| INTELSAT |
International
Telecommunications Satellite Consortium |
| INWATS |
Inward Wide-Area
Telephone Service |
| IOC |
integrated optical
circuit |
| IOC |
initial operational
capability |
| IOC |
input-output
controller |
| IOC |
integrated optical
circuit |
| IP |
Internet
protocol |
| IP |
intelligent
peripheral |
| IPA |
intermediate power
amplifier |
| IPS |
interruptions per
second |
| IPX |
Internet Packet
Exchange |
| IQF |
intrinsic quality
factor |
| IR |
infrared |
| IRAC |
Interdepartment Radio
Advisory Committee |
| IRC |
international record
carrier |
| IRC |
Interagency Radio
Committee |
| IS-136
TDMA |
USA cellular standard,
also known as D-AMPS |
| ISDN |
Integrated Services
Digital Network |
| LAN |
Local Area
Network |
| MAN |
metropolitan area
network |
| MDI |
Mobile Data
Initiative |
| MEECN |
Minimum Essential
Emergency Communications Network |
| Messenger |
Racal standard for
wireless packet data networks |
| MHS |
message handling
system |
| Mobitex* |
Ericsson standard for
wireless packet data networks |
| MTSO |
mobile telephone
switching office |
| MUF |
maximum usable frequency
muldem multiplexer/demultiplexer |
| MUX |
multiplex
multiplexer |
| MUXing |
multiplexing |
| MW |
microwave |
| NATA |
North American
Telecommunications Association |
| NAVSTAR-GPS |
Navigational Satellite
Timing and Ranging--Global Positioning System |
| NBRVF |
narrowband radio voice
frequency |
| NCC |
National Coordinating
Center for Telecommunications |
| NCS |
net control
station |
| NCS |
National Communications
System |
| NCS |
net control
station |
| NFS |
Network File
System |
| NIC |
network interface
card |
| NICS |
NATO Integrated
Communications System |
| NID |
network interface
device |
| NID |
network inward
dialling |
| NID |
network information
database |
| NID |
network interface
device |
| NIOD |
network inward/outward
dialing |
| NIU |
network interface
unit |
| NMT |
Nordic Mobile Telephone
system. Analog standard similar to AMPS |
| NOD |
network outward
dialing |
| NSTAC |
National Security
Telecommunications Advisory Committee |
| NT1 |
Network termination
1 |
| NT2 |
Network termination
2 |
| NTCN |
National
Telecommunications Coordinating Network |
| NTDS |
Naval Tactical Data
System |
| NTI |
network terminating
interface |
| NTIA |
National
Telecommunications and Information Administration |
| NTMS |
National
Telecommunications Management Structure |
| NTN |
network terminal
number |
