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Glossary of Terms


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

Select the first letter of the word from the list above to jump to appropriate section of the glossary. If the term you are looking for starts with a digit or symbol, choose the '#' link.


- A -

a.c.
Alternating Current
AAL
ATM Adaptation Layer
ACL
Advanced CMOS Logic
ADC
Analogue To Digital Converter
ADSL
Asymmetric Digital Subscriber Line
AF
Audio Frequency
AFC
Audio Frequency Control
AGC
Automatic Frequency Control
ALC
Automatic Level Control
AlGaAs
Aluminium Gallium Arsenide
ALU
Arithmetic Logic Unit
AM
Amplitude Modulation
ANSI
American National Standards
Institute
APD
Avalanche Photodiode
ARQ
Automatic Repeat Request
ASCII
Automatic Standards Code For Information Interchange
ASIC
Application Specific Integrated Circuit
ASK
Amplitude Shift Keying
ATE
Automatic Test Equipment
ATM
Asynchronous Transfer Mode
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- B -

B-ISDN
Broadband ISDN
BCD
Binary Coded Decimal
BER
Bit Error Rate
BERT
Bit Error Rate Tester
BFO
Beat Frequency Oscillator
BICOMS
Bipolar CMOS
BIOS
Basic Input / Output System
BJT
Bipolar Junction Transistor
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- C -

CAD
Computer Aided Design
CAE
Computer Aided Engineering
CAM
Computer Aided Manufacturing
CATV
Community Antenna Television
CDM
Code Division Multiplex
CDM
Control Design ???
CMOS
Complementary Metal Oxide Semiconductor
CODEC
Coder / Decoder
CPU
Central Processing Unit
CRC
Cyclic Redundancy Check
CT2
Cordless Telephony Generation 2
CTI
Computer Telephony Integration
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- D -

DAC
Digital to analogue converter
DASS
Digital Access Signalling Signal
dB
Decibel
dBm
Decibel with respect to 1mW
dBPa
Decibel Pascal
DBS
Direct Broadcast Satellite
dBS.P.L.
Decibel sound pressure level
dBV
Decibel with respect to 1 Volt
dc
Direct Current
DCE
Data Communications Equipment
DECT
Digital Enhanced Cordless Telephony
DIL
Dual In Line
DIP
Dual In Line Package
DMA
Direct Memory Access
DPSK
Differential Phase Shift Keying
DPST
Double Pole Single Throw
DPTP
Double Pole Double Throw
DRAM
Dynamic Random Access Memory
DSL
Digital Subscriber Line
DSP
Digital Signal Processor
DTE
Data Terminal Equipment
DTMF
Dual Tone Multi Frequency
DWDM
Dense Wavelength Division Multiplexer
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- E -

E1
G.703 2.048Mbit/s transmission
E3
G.703 34.736Mbit/s transmission
ECC
Error Correction Coding
ECC
Embedded Communication Channel
ECL
Emitter Coupled Logic
EEPROM
Electrically Erasable Programmable Read Only
EHF
Extremely High Frequency
EIA
Electronic Industries Association
ELF
Extremely Low Frequency
EMC
Electromagnetic Compatibility
EMI
Electromagnetic Interference
EPROM
Erasable Programmable Read Only Memory
ESD
Electro Static Discharge
ESL
Equivalent Series Inductance
ETSI
European Telecom Standards Institute
eV
Electron Volt
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- F -

FCC
Federal Communications Commission
FDDI
Fibre Distributed Data Interface
FDM
Frequency Division Multiplex
FEC
Forward Error Correction
FER
Frame Error Rate
FET
Field Effect Transistor
FFT
Fast Fourier Transform
FIFO
First In First Out
FLOP
Floating Point Operations
FM
Frequency Modulation
FPGA
Field Programmable Gate Array
FSK
Frequency Shift Keying
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- G -

G
Giga 1x10 (12)
GaAs
Gallium Arsenide
GEO
Geostationary Earth Orbit
GPS
Global Positioning System
GSM
Global System for Mobile Comms
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- H -

HDLC
High Level Data Link Control
HDSL
High Data Rate Digital Subscriber Line
HF
High Frequency
HFC
Hybrid Fibre Coaxial
Hz
Hertz
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- I -

I/O
Input / Output
IC
Integrated Circuit
IEEE
Institute of Electrical and Electronic Engineering
IF
Intermediate Frequency
INTELSAT
International Telecom Satellite Organisation
IR
Infrared
IrDA
Infrared Data Association
ISA
Industry Standards Architecture
ISDN
Integrated Service Digital Network
ITU
International Telecom Union
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- J -

JFET
Junction Field Effect Transistor
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- L -

LAN
Local Area Network
LCD
Liquid Crystal Display
LDCC
Leaded Ceramic Chip Carrier
LED
Light Emitting Diode
LF
Low Frequency
LiIon
Lithium ion
LNB
Low Noise Block Downconverter
LO
Local Oscillator
LOS
Line Of Sight
LOS
Loss Of Signal
LSB
Least Significant Bit
LSI
Large Scale Integration
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- M -

MAC
Medium Access Control
MIL
Military Specification
MIPS
Million Instructions Per Seconds
MODEM
Modulator - Demodulator
MOS
Metal Oxide Semiconductor
MTBF
Mean Time Between Failures
MUX
Multiplexer
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- N -

NiCd
Nickel Cadmium
NiMH
Nickel Metal Hydride
NRZ
Non Return To Zero
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- O -

OC-12
622Mbit/s Optical Carrier
OC-3
155Mbit/s Optical Carrier
OC-48
2.4 Gbit/s
OCR
Optical Character Recognition
OEM
Original Equipment Manufacturer
OSI-7
Open System Interconnection
OTDR
Optical Time Domain Reflectometer
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- P -

P-P
Peak To Peak
PABX
Private Automatic Branch Exchange
PAM
Pulse Amplitude Modulation
PBX
Private Branch Exchange
PCB
Printed Circuit Board
PCIA
Personal Comms Industry Association
PCM
Pulse Code Modulation
PCMCIA
Portable Computer Memory Card International
PCN
Personal Communications
Network
PDH
Piesiochronous Digital Hierarchy
PFM
Pulse Frequency Modulation
PIXEL
Picture Element
PLCC
Plastic Leaded Chip Carrier
PLD
Programmed Logic Device
PLL
Phase Locked Loop
POT
Plain Ordinary Telephone
PPM
Parts Per Million
PQFP
Plastic Quad Leaded Flat Pack
PRBS
Pseudorandom Bit Sequence
PSTN
Public Switched Telephone Network
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- Q -

QAM
Quadrature Amplitude Modulation
QFP
Quad Flat Pack
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- R -

RAM
Random Access Memory
RF
Radio Frequency
RFI
Radio Frequency Interference
RISC
Reduced Instruction Set Computer
RMS
Root Mean Square
ROM
Read Only Memory
RSSI
Received Signal Strength Indicator
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- S -

S-video
Separate Luminance and Chrominance
SCADA
Supervisory Control & Data Acquisition Systems
SDH
Synchronous Digital Hierarchy
SHF
Super High Frequency
SLIC
Subscriber Line Interface Chip
SNOT
Synchronous Optical Network
SNR
Signal To Noise Ratio
SPICE
Simulation Program with Integrated Circuit Emphasis
SPST
Single Pole Single Throw
SPST
Single Pole Single Throw
SRAM
Static Random Access Memory
STM-1
Synchronous Transmission Module, Level One
STM-16
Synchronous Transmission Module, Level Sixteen
STM-4
Synchronous Transmission Module, Level Four
SWR
Standing Wave Radio
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- T -

T3
44.736 M bit/s
TDM
Time Division Multiplex
TDR
Time Domain Reflectometer
Tetra
Trans European Truncked Radio
TIA
Telecom Industry Association
TIMS
Transmission Impairment Measurement Set
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- U -

UART
Universal Asynchronous Receiver Transmitter
UHF
Ultra High Frequency
UTP
Unshielded Twisted Pairs
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- V -

VA
Voltamp
VCO
Voltage Controlled Oscillator
VDSL
Very High Data Rate Digital Subscriber Line
VGA
Video Graphics Array
VHF
Very High Frequency
VLF
Very Low Frequency
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- W -

WAN
Wide Area Network
WDM
Wave Division Multiplexer
WLAN
Wireless Local Area Network
WLL
Wireless Local Loop
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