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
Summary of Contents for Aprisa XE
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