What are the abbreviations regarding telecommunication sector?

ACCPR: Adjacent Channel Coupled Power Ratio
ACIPR: Adjacent Channel Interference Power Ratio
ADC: American Digital Carrier (D-AMPS)
ADC: Analog-Digital Converter
ADPCM: Adaptive Differential Pulse Code Modulation
AFR: Active Feedback Resonator
AGC: Automatic Gain Control
AM: Amplitude Modulation
AMPS: Advanced Mobile Phone System
ANSI: American National Standards Institute
APPL: Analog PLL
ASK: Amplitude Shift Keying

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BCDMA: Broad Band CDMA
BER: Bit Error Rate
BETRS: Basic Exchange Telecommunication Radio Service
BPF: Bandpass Filter
BPSK: Binary Phase Shift Keying

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CADN: Cellular Access Digital Network
CAI: Common Air Interface
CDMA: Code Division Multiple Access
CDPD: Cellular Digital Packet Data
CELP: Code Book Excited Linear Predictive Coding
C/I: Carrier to co-channel Interference
CPE: Customer Premises Equipment
CPFSK: Continuous Phase Frequency Shift Keying
CQM: Channel Quality Measurement
CRC: Cyclical Redundancy Check
CT: Cordless Telephone
CTIA: Cellular Telecommunication Industry Association
CVSM: Continuously Variable Slope Delta Modulation
CW: Continuous Wave

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DAC: Digital-Analog Converter
DAMPS: Digital AMPS
dB: Decibel
dBc: Decibel below carrier (measurement of phase noise)
dBm: Decibel (relative to 1 mW)
DBM: Double Balanced Mixer
DBS: Direct Broadcast Satellite
dBW: Decibel (relative to 1 Watt)
DCS: Digital Cellular System
DECT: Digital European Cordless Telephone
DFT: Discrete Fourier Transform
DPLL: Digital PLL
DPSK: Differential Phase Shift Keying
DQPSK: Differentially Encoded Quadrature Phase Shift Keying
DR: Dynamic Range
DS Direct Sequence
DSP: Digital Signal Processor
DTMF: Dual Tone Multi Frequency

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EMC: Electromagnetic Compatibility
EMF: Electromagnetic Field
EMI: Electromagnetic Interference
EMR: Electromagnetic Radiation
E-TACS: Extended Total Access Communication System
ETDMA: Enhanced TDMA (with DSI- Digital Speech Interpolation)
ETSI: European Telecommunication Standard Institute

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FCC: Federal Communications Commission
FDD: Frequency Division Duplex
FDM: Frequency Division Multiplex
FDMA: Frequency Division Multiple Access
FFSK: Fast Frequency Shift Keying
FFT: Fast Fourier Transform
FH Frequency Hopping
FIR: Finite Impulse Response (filter)
FM: Frequency Modulation
FPLMTS: Future Public Land Mobile Telephone Service
FSK: Frequency Shift Keying

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GaAs: Gallium Arsenide
GBBC: GSM Baseband Codec
GFSK: Gaussian Frequency Shift Keying
GMSK: Gaussian-filtered Minimum Shift Keying
GOLD: GSM One-Chip Logic Device
GPS: Global Positioning System
GSM: Global System for Mobile Communications

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HBT: Heterojunction Bipolar Transistor
HEMT: High Electron Mobility Transistor
HPF: High Pass Filter

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IF: Intermediate Frequency
IFF: Interfrequency Filter
IIR: Infinite Impulse Response (filter)
IM: Intermodulation
IMD: Intermodulation Distortion
IMR: Intermodulation Distortion Ratio
IP: Intercept Point
ISM: Industrial Scientific Medical (frequency band)
ISO: International Organization for Standardization
ITU: International Telecommunications Union

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JDC: Japanese Digital Carrier

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LAN: Local Area Network
LEO: Low Earth Orbiting Satellite
LF: Loop Filter
LNA: Low Noise Amplifier
LO: Local Oscillator
LPC: Linear Predictive Coding
LPF: Low Pass Filter
LPLL: Linear PLL

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MAC: Medium Access Control
MAHO: Mobile Assisted Handoff
MAN: Metropolitan Area Network
MBS: Mobile Broadband System
MDSB: Mobile Data Base Station
MESFET: Metal Schottky FET
MFSK: Multi Frequency Shift Keying
MMIC: Monolithic Microwave IC
MMU: Memory Management Unit
MODEM: Modulator/Demodulator
MOS: Metal Oxide Semiconductor
MOSFET: Metal Oxide Semiconductor FET
MS: Mobile Station
MSA: Metropolitan Service Area
MSK: Minimum Shift Keying
MTSO: Mobile Telephone Switching Office

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NAMPS: Narrow Band AMPS
NCDMA: Narrow Band CDMA
NMS: Network Management System
NMT: Nordic Mobile Telecommunication System (cellular communication system in Scandinavia)
NPR: Noise Power Ratio
NTM: Network Traffic Management

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OSI: open system interconnection.

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PAM: Pulse Amplitude Modulation
PBX: Private Branch Exchange
PCM: Pulse Code Modulation
PCMCIA: PC Memory Card International Association
PCN: Personal Communications Network
PCS: Personal Communication Services
PD: Phase Detector
PDM: Pulse Duration Modulation
PDU: Protocol Data Unit
PHP: Personal Handy Phone (Japan)
PHS: Personal Handy Phone System (Japan)
PIN: Positive Intrinsic Negative (diode)
PLL: Phase-Locked Loop
PLMN: Public Land Mobile Network
PM: Pulse Modulation
POTS: Plain Old Telephone Service
PSD: Power Spectral Density
PSK: Phase Shift Keying
PUREG: Power Up Registration
PWM: Pulse Width Modulation

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Q: Quality Factor (e.g. filter)
QAM: Quadrature Amplitude Modulation
QPSK: Quadrature Phase Shift Keying

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RELP: Residual-Excited Linear Predictive Coding
RF: Radio Frequency
RFI: Radio Frequency Interference
RFIC: Radio Frequency IC
RITL: Radio-in-the-Loop
RPE-LTP: Regular Pulse Excitation-Long Term Prediction (GSM speech encoding method)
RSA: Rural Service Area
RSSI: Radio Signal Strength Indicator

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SAW: Surface Acoustic Wave (filter)
S/H: Sample and Hold
SIEGET Siemens Grounded Emitter Transistor
SINAD: Ratio of Signal plus Noise plus Distortion to Noise plus Distortion
SIM: Subscriber Identity Module
SMS: Short Message Service
S/N: Signal to Noise
SNR: Signal-to-Noise Ratio
SPLL: Software PLL
SS: Spread Spectrum
SSB: Single Sideband
SWR: Standing Wave Ratio

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TACS: Total Access Communication System (analog cellular communication in UK)
TCXO Temperature-Compensated Crystal Oscillator
TDD: Time Division Duplex
TDM: Time Division Multiplexing
TDMA: Time Division Multiple Access
THD: Total Harmonic Distortion
TIA: Telecommunication Industry Association

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UMTS: Universal Mobile Telecommunication Service
UHF: Ultra High Frequency

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VCO: Voltage-Controlled Oscillator
VCVS: Voltage-Controlled Voltage Source (filter)
VCXO: Voltage-Controlled Crystal Oscillator
VHDL: Very High Speed Integrated Circuit Hardware Descriptive Language
VHF: Very High Frequency
VQ: Vector Quantization
VSAT: Very Small Aperture Terminal
VSELP: Vector Sum Excited Linear Predictive Coding (IS-54 speech encoding)
VSWR: Voltage Standing Wave Ratio

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WAN: Wide Area Network
WARC: World Administrative Radio Conference
WCPE Wireless Customer Premises Equipment
WLAN: Wireless LAN
WLL Wireless Local Loop

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XMTR: Transmitter
XTALK: Crosstalk