4B/3D(code)--4 Binary/3 ternary (code)4二进制/3三电平（码）AA/D --Analog/Digital数/模AAL--ATM adaptation layer ATM适配层AC. ac.--Alternating Current 交流ACK --ACKnowledge确认ADC--Application data center集中托管式数据应用中心--Analog-to-Digital Converter模拟/数字转换器(模数变换器)ADPCM--Adaptive DPCM自适应差分脉（冲编）码调制ADPCM--Adaptive DPCM自适应差分脉冲编码调制ADSL--Asymmetric Digital Subscriber Line非对称数字用户环路ADSL--Asymmetric Digital Subscribers Loop非对称数字用户环路AM--Amplitude Modulation 幅度调制、调幅AM--Amplitude Modulation振幅调制（调幅）AMI--Alternate Mark Inverse传号交替反转ANSI--American National Standards Institute美国国家标准学会APK --Amplitude Phase Keying幅相键控APT--the Advanced Packaging Tool Ubuntu软件包管理系统的高级界面ARQ--Automatic Repeat reQuest自动要求重发ASCII--American Standard Code for Information Interchange美国标准信息交换码ASIC--Application Specific Integrated Circuit专用集成电路ASK--Amplitude Shift Keying振幅键控AT&T--American Telephone & Telegraph美国电话电报公司ATM--Automated Tellermachine自动取款机--Asynchronous Transfer Mode 异步转移（传递）模式AU--Administration Unit管理单元AUG--Administration Unit Group管理单元群BBCD--Binary Coded Decimal二十进制B-ISDN--Broadband ISDN宽带综合业务数字网BPF--Bandpass Filter带通滤波器BRAN--Broadband Radio Access Network宽带射频接入网BRI--Basic Rate Interface基本速率接口CCAS--Channel Associated Signaling随路信令CCITT--Consultive Committee for International Telegraph and Telephone国际电报电话咨询委员会C--Container容器CCS--Common Channel Signaling共路信令CDMA--Code Division Multiple Access码分多址CDM--Code Division Multiplexing码分复用CELP--Code Excited Linear Prediction码激励线性预测CLP--Cell Lose Priority信元丢失优先等级CMI--Coded Mark Inversion传号反转COR-PSK--Correlative Phase-Shift Keying相关移相键控CPU--Central Processing Unit中央处理器CRC--Cyclic Redundancy Check循环冗余校验CRT --Cathode Ray Tube 阴极射线管（显示器）--Chinese Remainder Theorem 中国剩余定理CSMA/CD--Carrier Sense Multiple Access/Collision Detection载波侦听/冲突检测DDAC--Digital Audio Compress数/模转装换器(数字模拟转换器)DAMA--Demand Assignment Multiple Address按需分配多址DC. (dc.)--Direct Current 直流DCT--Discrete Cosine Transform离散余弦变换DES --Data Encryption Standard数据加密标准DFT--Discrete Fourier Transform离散傅里叶变换DM (M)--Delta Modulation增量调制DOS--Disk Operating System磁盘操作系统DPCM--Differential Pulse Code Modulation差分脉（冲编）码调制DPSK--Differential Phase Shift Keying差分相移键控DSB--Double Side Band双边带DSBSC--Double Sideband Suppressed Carrier双边带抑制载波DS--Direct Sequence(spread spectrum)直接序列（扩谱）DSP--Digital Signal Processing数字信号处理DSSS--Direct-Sequence Spread Spectrum直接序列扩谱DTE--Data Terminal Equipment数据终端设备DTMF--Dual Tone Multiple Frequency双音多频DVB--Digital Video Broadcasting数字视频广播EEDGE--Enhanced Data Rates for GSM Evolution提高GSM数据率的改进方案EDI--Electronic Data Interchange电子数据交换Erl--Erlang爱尔兰ETSI--European Telecommunication Standards Institution欧洲电信标准协会FFCS--Fast Circuit Switching快速电路交换FDD--Frequency Division Duplex频分双工FDMA--Frequency Division Multiple Access频分多址FDM--Frequency Division Multiplexing频分复用FEC--Forward Error Correction前向纠错Fed--Free Euclidean Distance自由欧式距离FET--Field-Effect Transistor 场效应管F--Frame帧FFT --Fast Fourier Transform 快速傅立叶变换FH--Frequency-Hopping跳频FIFO--First-In First-Out先进先出FIR--Finite Impulse Response有限冲激响应FM--Frequency Modulation 频率调制、调频FSK--Frequency-Shift Keying移频键控FTP-- Protocol文件传输协议GGFC--Generic Flow Control一般流量控制GMSK--Gaussian MSK高斯最小频移键控GPRS--General Packet Radio Service 通用无线分组业务GSM--Global System for Mobile Communications全球移动通信系统HHDB3--3rd Order High Density Bipolar3阶高密度双极性（码）HDLC--High-level Data Link Control高级数据链路控制HDTV--High Definition Television高清晰度电视HEC--Header Error Control信元头差错控制HPS--High Packet Switching高速分组交换HSCSD--High Speed Circuit Switched Data高速电路交换数据HT--Hadamard Transform哈达玛变换HTTP--Hypertext Transfer Protocol 超文本传输协议IIC--Integrated Circuit 集成电路IDFT--Inverse Discrete Fourier Transform逆离散傅里叶变换IEC--International Electrotechnical Commission国际电工委员会IEEE --Institute of Electrical and Electronics Engineers 电气与电子工程师协会IFFT --Inverse Fast Fourier Transform 逆快速傅立叶变换IIR--Infinite Impulse Response无限冲激响应ISDN --integrated services digital network 综合业务数字网ISI--Intersymbol Interference码间干扰ISO --International Standardization Organization国际标准化组织ITM--Information Transfer Mode信息传递方式ITU --International Telecommunications Union国际电信联盟ITU-T--ITU Telecommunication Standardization Sector国际电信联盟电讯标准部LLAN --local area network 局域网LASER(laser)--Light Amplification by Stimulated Emission of Radiation通过受激发射光扩大(激光)LCD--Liquid Crystal Display 液晶显示器LCM--Lowest Common Multiple最小公倍数LD-CELP--Low Delay Code Excited Linear Prediction低延迟码激励线性预测LDPC--Low-Density Parity-Check低密度奇偶校验LED--Light Emitting Diode发光二极管-- Large Electronic Display大型电子展示-- Lupus erythematosus disseminatus播散性红斑狼疮LED--Light-Emitting Diode发光二极管LPC--Linear Prediction coding线性预测编码LPF--Lowpass Filter低通滤波器MMAN--Metropolitan Area Network 城域网MASK--M-ary Amplitude Shift Keying M进制振幅键控MCPC--Multiple Channel Per Carrier每载波多路MFSK--M-ary Frequency Shift Keying M进制移频键控MPSK--M-ary Phase Shift Keying M进制相移键控MSK--Minimum Shift Keying最小移频键控NNAK--Negative Acknowledge否认NBFM--Narrow Band Frequency Modulation窄带调频N-ISDN--Narrowband ISDN窄带综合业务数字网NNI--Network Node Interface网络节点接口NRZ--Non Return-to-Zero不归零NT--Network Terminal网络终端NTSC--National Television Standards Committee（美国）国家电视标准委员会OOFDM--Orthogonal Frequency Division Multiplexing正交频分复用OOK--On Off Keying通-断键控OQPSK--Offset Quadrature Phase Shift Keying偏置正交相移键控OSI/RM--the Reference Model of Open Systems Interconnection开放系统互联参考模型OSI--Open Systems Interconnection开放系统互连PPAD--Packet Assembly and Disassembly信号包组装和拆卸PAL--Programmable Array Logic可编程阵列逻辑PAM--Pulse Amplitude Modulation脉（冲振）幅调制PAN--Personal Area Network个（人区）域网PCM--Pulse Code Modulation脉（冲编）码调制PDH--Plesiochronous Digital Hierachy准同步数字体系PDM--Pulse Duration Modulation脉（冲）宽（度）调制PDN--Public Data Network公共数据网PDU--Protocol Data Unit协议数据单元PIX--Pixel像素PLL--Pulse-Locked Loop锁相环PM--Pulse Modulation脉冲调制PN--Pseudo Noise伪噪声PPM--Pulse-Position Modulation脉（冲）位（置）调制PRI--Primary Rate Interface基群速率接口PSK--Phase Shift Keying相移键控PST(code)--Paired Selected Ternary成对选择三进制（码）PSTN--Public Switch Telephone Network公共交换电话网PT--Payload Type有用负荷类型QQAM--Quadrature Amplitude Modulation正交振幅调制QDPSK--Quadrature DPSK正交差分相移键控QPR--Quadrature Partial Response正交部分响应QPSK--Quadrature Phase Shift Keying正交相移键控RRADAR(radar)--Radio Detection And Ranging无线电探测与定位(雷达)RAM--Random Access Memory随机存取存储器RAM--random access memory随机存储器RLAN--Radio LAN无线局域网ROM--Read-Only Memory只读存储器ROM--Read-Only Memory只读内存RPE-LTP--Regular Pulse Excitation with Long-Term Prediction规则脉冲激励长时预测R-S(code)--Reed-Solomon(code)里德-索洛蒙（码）RSCC--Recursive Systematic Code递归系统卷积码RTOS--Real-time operating system实时系统RZ--Return-to-Zero归零SSDH--Synchronous Digital Hierarchy同步数字体系SSB--Single Sideband单边带STM--Synchronous Transfer Mode同步转移模式TTCM--Trellis Coded Modulation网格编码调制TCP/IP--Transmission Control Protocol/Internet Protocol传输控制协议/因特网互联协议(网络通讯协议)TDM--Time Division Multiplexing时分复用TFM--Tamed Frequency Modulation软调频UUSB--Universal Serial Bus 通用串行总线VVB(decoding)--Viterbi (decoding)维特比（译码）VCI--Virtual Channel Identifier虚通道标记VC--Virtual Channel虚通道VS-- Vestigial Sideband残留边带WWAN--Wide Area Network 广域网WDM--Wavelength Division Multiplexing波分复用WT--Walsh Transform沃尔什变换world wide web 全球网、万维网。