A
ADPCM - adaptive differential pulse code modulation
AIN - advanced intelligent network
AMPS - advanced
mobile phone service
ANSI - American National Standards Institute
ASIC - application-specific integrated circuit
ASTN - Automotive
Satellite Television Network
ATM - asynchronous transfer mode
ATM - automated teller machine
B
BECN - backward
explicit congestion notification
BPSK - binary
phase-shift keying
BSC - base station controller
BTS - base transceiver station
C
CAD - computer-aided design
CCITT -
Consultative Committee for International Telegraphy &
Telephony
CDMA - code
division multiple access
CDPD - cellular
digital packet data
CEU - Continuing Education Unit
CIR - committed information rate
CMD-IS - circuit switched CDPD
mobile data intermediate system
CMIP - common
management information protocol
CMIS - customer
management information service
CMOS - Complementary
Metal Oxide Semiconductor
CS-CDPD - circuit switched cellular digital
packet data
CO FRAD - Central Office FRAD
CSM - cell service module
CSU - channel service unit
CU - channel unit
D
DAMA - demand-assigned
multiple access
DBS - Direct Broadcast Satellite
DCE - digital communications equipment
DCLI - data link correction identifier
DIU - digital indoor unit
DLS - data link switching
DSP - digital signal processing
DSU - data service unit
DTE - data terminal equipment
F
FCC - Federal Communications Commission
FECN - forward
explicit congestion notification
FPGA - field
programmable gate array
FRAD - frame
relay assembler/disassembler
FSM - frame service module
FTP - file transfer protocol
G
GES -
Gemini Earth Station
GMAC - General Motors
Acceptance Corporation
GUI - graphic user interface
H
HDLC - high-level
data link control
HES - Hybrid Earth Station
HLR - home location register
HNS - Hughes Network Systems, Inc.
HSS - Hughes Software Systems, India
HVAC - heating,
ventilation, and air conditioning
I
IACET - International Association for Education and Training
IDF - intermediate distribution frame
IDS - Inventory Distribution System
IDU - indoor unit
IETF - Internet Engineering Task Force
IF - intermediate frequency
IFL - interfacility unit
IFU - internal framing unit
IMS - Installation Management system
IN - intelligent network
I/O - input/output
IP - internet protocol
IPX - internet packet exchange
ISBN - Integrated
Satellite Business Network`
ISDN -
integrated-services digital network
ITU - international Telecommunications Union {replaced CCITT)
L
LA
- location area
LAN - local area network
LD-CELP - low delay code excited linear
prediction
LEC - local exchange carrier
LNA - low noise amplifier
LNB - low noise block
down converter
M
M-ES - mobile-end systems
MBMP - modem bank
management protocol
MDBS - mobile
database station
MDF - main
distribution frame
MD-IS - mobile
data-intermediate system
MIB - management information base
MIPS - million
instructions per second
MPOA - multi
protocol-over-ATM
MRP - materials
requirements planning (system)
MSC - mobile
switching center
MSU - multi
subscriber
unit
MTSO - mobile telephone
switching office
N
NCC - network
control center
NEI - network equipment identifier
NHRP - next hop
resolution protocol
NFS - network
file system
NMS - network
management system
NNI - network-to-network interface
NRF - National
Retail Federation
NSW - Nippon
Systemware Co. Ltd., Japan
O
O&M -
operations and maintenance
ODU - outdoor
unit
OCC - operations
control center
OLTP - online
transaction process
OMC - operations
and maintenance center
OSPF - open shortest
path first
P
PABX - private automatic
branch exchange
PACS - Personal Access
Communications System
PAT - product
assurance test
PBC - People's
Bank of China
PBX - private
branch exchange
PCMCIA - Personal Computer Memory Card Industry
Association
PCS - Personal
Communications Services
PES - Personal
Earth Station`
PM - Program Manager
POS - point-of-sale
PSTN - public switched
telephone network
PVC - permanent
virtual circuit
Q
QLLC - quality link layer
control
QoS - Quality
of Service
QPSK - quadrature
phase-shift keying
R
RDBMS - Relational Database Management System
RES - Receive-Only
Earth Station
RF - radio frequency
RFC - request
for comment
ROM - read-only memory
RP - radio port
RPCU - radio port controller unit
RX - receive
S
SCADA - supervisory control and data
acquisition
SCM - switch
control module
SCPC - single channel
per carrier
SDLC - synchronous data
link control
SENA - Switched
Enterprise Network Architecture
SMDS - switched megabit data
services
SMT - surface
mount technology
SMTP - simple mail transfer
protocol
SNA - Systems
Network Architecture
SNMP - simple network
management protocol
SSU - single
subscriber unit
SVC - switched
virtual circuit
T
TCP/IP - transmission control
protocol/internet protocol
TDM - time division
multiplexing
TDMA - time division multiple access
TES - Telephony
Earth Station
TRAI - Telecom
Regulatory Authority of India
TWA - two-way
alternating
TWS - two-way
simultaneous
TX - transmit, transmission
U
UDP - user
datagram protocol
UMOD - 9100 Universal Modem
UNI - user-to-network
interface
USICA - US-India Commercial Alliance
V
VC - virtual
circuit
VCI - virtual
circuit identifier
VLR - visitor
location register
VLSI - very large-scale
integration
VPI - virtual
path identifier
VSAT - very small aperture
terminal
W
WAN - wide area network
WLL - wireless local loop
X
XID - exchange
identification
