User Manual

Abbreviations | 257
20. Abbreviations
ADC Analogue to Digital Converter
ADPCM Adaptive Differential Pulse Code
Modulation
ADSL Asymmetrical Digital Subscriber Line
AGC Automatic Gain Control
AMP Amplifier
BER Bit Error Rate
CAS Channel Associated Signalling
CPE Customer Premises Equipment
CLI Calling Line Identification
DAC Digital to Analogue Converter
dB Decibels
dBc Decibels relative to carrier power
dBm Decibels relative to 1 mW
dBr Decibels relative to the tramsmission
reference point
DCE Data Communications Equipment
DS0 Digital Signal 0 - 64 kbit/s Timeslot
DTE Data Terminal Equipment
DTI Digital Trunk Interface
E&M Ear and Mouth
EMC Electro-Magnetic Compatibility
EMI Electro-Magnetic Interference
ESD Electro-Static Discharge
ETSI European Telecommunications Standards
Institute
FAS Frame Alignment Signal (E1 frame)
FEC Forward Error Correction
FFE Feed Forward Equalizer
F/W Firmware
FXO Foreign Exchange Office
FXS Foreign Exchange Subscriber
GSM Global System for Mobile communications
HSC Hardware Software Compatibility
HSS High-Speed Synchronous Serial
H/W Hardware
IC Integrated Circuit
IF Intermediate Frequency
IP Internet Protocol
I/O Input/Output
ISP Internet Service Provider
kbit/s Kilobits per second
kHz Kilohertz
LAN Local Area Network
LED Light Emitting Diode
LOS Loss of Signal
mA Milliamps
MAC Media Access Control
Mbit/s Megabits per second
MHSB Monitored Hot Standby
MHz Megahertz
MIB Management Information Base
MTBF Mean Time Between Failures
MTTR Mean Time To Repair
ms milliseconds
NFAS Not Frame Alignment Signal (E1
frame)
NMS Network Management System
OSI Open Systems Interconnection
PABX Private Automatic Branch Exchange
PBX Private Branch Exchange
PC Personal Computer
PCM Pulse Code Modulation
PCA Printed Circuit Assembly
PLL Phase Locked Loop
POP Point of Presence
POTS Plain Old Telephone Service
ppm Parts Per Million
PSTN Public Switched Telephone Network
PMR Public Mobile Radio
QAM Quadrature Amplitude Modulation
QPSK Quadrature Phase Shift Keying
RAI Remote Alarm Indicator
RF Radio Frequency
RoHS
Restriction of Hazardous Substances
RSSI Received Signal Strength Indication
RX Receiver
SNMP Simple Network Management Protocol
SNR Signal to Noise Ratio
SWR Standing Wave Ratio
TCP/IP Transmission Control Protocol/Internet
Protocol
TCXO Temperature Compensated Crystal
Oscillator
TETRA Terrestrial Trunk Radio
TFTP Trivial File Transfer Protocol
TMR Trunk Mobile Radio
TX Transmitter
UTP Unshielded Twisted Pair
VCO Voltage Controlled Oscillator
VDC Volts DC
VoIP Voice over Internet Protocol
WEEE
Waste Electrical and Electronic
Equipment