1. 专用名词和缩写AAL ATM Adaptation LayerATM 适配层ACQ Acquisition signal, used by the SIT to log on to the satellite network.获得接入控制子系统非对称数字用户线文件传输协议ACSS Access Control Sub-SystemADSL Asymmetric Digital Subscriber Line AGC File transfer protocol.AlarmANSIA non-recoverable fault in the IDU that requires user intervention. IDU 中一个不可恢复的错误要求用户干涉美国国家标准协会应用编程接口地址解析协议异步连续接口自动测试设备异步传输模式 宽带接入服务 误码率 突发时钟频率计划 事件管理层 上变频模块 载波噪声密度 恒定比特速American National Standards InstituteAPI Application Program Interface ARP Address Resolution Protocol ASI Asynchronous Serial Interface ATE Automated Test Equipment ATM Asynchronous Transfer Mode BASBroadband Access Server BER Bit Error RateBFTP Burst and Frequency Time Plan BML Business Management Layer BUC Block Up-ConverterC/No Carrier to Noise Density CBR Constant Bit Rate率CF-DAMA Combined Free Demand Assignment Multiple Access 自由用户供给设备单元丢失率修正信息表 服务等级 恒定速率分配 循环冗余检测 通用信号通道 持续波 按需分配多址技术 分贝组合按需分配多址技术CFECustomer Furnished Equipment CLR Cell Loss RatioCMT Correction Message Table CoS Class of ServiceDAMA Demand Assignment Multiple AccessCRA Continuous Rate Assignment CRC Cyclic Redundancy Check CSC Common Signaling Channel CW Continuous Wave dB Decibel.dBm Decibel milliwatts. A logarithmic measure of power, referenced to 1 milliwatt (1 mW = 0dB)毫分贝dBW Decibel watts. A logarithmic measure of power referenced to 1 watt (1 W = 0 dBW). 毫分贝DDS Direct Digital Synthesizer 直接数字合成器 DHCP Dynamic Host Configuration Protocol 动态主机设置协议DMS Degrees / Minutes /Seconds度/分/秒DNS Domain Name Server 域名服务器DSL Digital Subscriber Link 数字用户链路DSLAM Digital Subscriber Loop Access Multiplexer 数字用户环形接入复用器DVB-RCS Digital Video Broadcast -Return Channel System 数字视频广播一 回传信道系统Eb/No Signal to noise ratio.信噪比EIRP Effective Isotropic Radiated Power 等效全向辐射功率EML Equipment Management Layer设备管理层ESD Electrostatic discharge静电冲击ETSI European Telecommunications Standards Institute 欧洲电信标准协会FAD Functional Access Domain功能接入域FCA Free Capacity Assignment自由容量分配FCAPS Fault Configuration Accounting Performance & Security(management) 错误设置统计性能和安全(管理)FCT Frame Composition Table帧组成表FDMA Frequency Division Multiple Access 频分多址技术FECForward Error Correction前向纠错FL Local area network.当地网络FLSS Forward Link Sub-System FR Frame RelayFSH Forward Signaling Handler FTP File Transfer Protocol前向链路子系统 帧中继 前向信号控制 文件传输协议G/T Antenna Gain to System Noise Temperature Ratio 天线增益系统噪声温度比GAC Gateway Access ControllerGEM Gateway Equipment ManagerGMSS Gateway Management Sub-System GUIGraphical User InterfaceHPA High Power AmplifierHTML HyperText Mark-up LanguageHTTP HyperText Transfer ProtocolIBO Input Back OffIBR In-Band RequestICMP Internet Control Message ProtocolID IdentifierIDU Indoor UnitIF Program Clock Reference.IFL Interfacility LinkIGMP Internet Group Management Protocol IP Internet Protocol网关接入控制器 网关设备管理器 网关管理子系统 图形用户界面 高功率放大器 超文本标记语言 超文本传输协议 输入反馈 带内请求 网间控制报文协议 标识 室内单元 程序时钟参考 设备间链路 互联网分组管理协议 互联网协议IPSec IP SecurityIP 安全IPSec key A widely-used network authentication protocol. 一个广泛使用的 网络验证协议IRD Integrated Receiver/Decoder综合接收机/解码器ISO International Standards Organization 国际标准组织互联网服务供应商ISP Internet Service Provider千比特每秒二层封装协议局域网左旋极化 低噪声转换模块 本地操作控制台 监控 媒体接入控制 兆比特每秒 多载波解调器ITU International Telecommunication Union 国际电信联盟kbps Kilobits per secondL2TP Layer Two Tunneling Protocol LAN Local, Area NetworkLHCP Left Hand Circular Polarization LNB Low-Noise Blockdown Converter LOC Local Operator ConsoleM&C Monitor and ControlMAC Medium Access ControlMbits/s Megabits per secondMCD Multi Carrier DemodulatorMF-TDMA Multi-Frequency Time-Division Multiple Access 多频时分多址技术MGT Multicast Group Table 多路分组表MIB Management Information Base 管理信息库MMT Multicast Mapping Table 多路映射表MOAM Master Operation Administration & Maintenance 主要操作管理维多协议封装运动图像专家组多协议标签交换 平均故障间隔时间 平均修理时间 网络接入范围 网络地址转换网络参考时钟网络信息表网络管理层网络操作中心不敏感的装置护MPE Multi Protocol Encapsulation MPEG Moving Pictures Experts Group MPLS Multi-Protocol Label Switching MTBF Mean Time Between Failure MTTR Mean Time To Repair NAD Network Access Domain NATNetwork Address Translation NCR Network Clock ReferenceNIT Network Information TableNML Network Management Layer NOC Network Operations Center NPM Non Penetrating MountOA&M Operation Administration & Maintenance 操作管理维护室外反馈带外请求室外单元节目分配表个人电脑周边元件扩展接口 单元峰值速率程序参考时钟协议数据单性能增强代理服务器分组标识符定向锁定回路OBO Outdoor Back OffOBR Out-Band RequestODU Outdoor UnitPAT Program Association TablePC Personal ComputerPCI Personal Computer Interface PCR (ATM) Peak Cell RatePCR (MPEG) Program Clock ReferencePDU Protocol Data Unit元PEP Performance Enhancing ProxyPID Packet IdentificationPLL Phase Locked LoopPMT Program Map TablePOP Point of PresencePPPoE Point to Point Protocol over Ethernet PPTP Point to Point Tunneling Protocol PSI Program Specific InformationPV