华为MA5100、MA5103硬件描述02-A 缩略语.doc

SmartAX MA5100/MA5103硬件描述目 录目 录A 缩略语A-1文档版本 02 (2006-09-08)华为技术有限公司A-3SmartAX MA5100/MA5103硬件描述A 缩略语A 缩略语AAAL1ATM Adaption Layer Type 1ATM适配层类型1AAL5ATM Adaptation Layer 5ATM 适配层 5ACAlternating Current交流电ADSLAsymmetric Digital Subscriber Line非对称数字用户环路ATMAsynchronous Transfer Mode异步传输模式ATU-RADSL transceiver unit, remote endADSL收发器远端终端用户BBATBearer Association Transport承载关系传送CCBRConstant Bit Rate恒定比特率，固定比特率CellBusCell Bus信元总线CESCircuit Emulation Service电路仿真业务CPUCenter Processing Unit中央处理单元DDCDirect Current直流（电）DDFData Decryption Field数字配线架（中继）DDNDigital Data Network数字数据网DSLAMDigital Subscriber Line Access Multiplexer数字用户线接入复接器EESCEnvironment & Power Monitoring Board环境和电源监控板ESDElectrostatic Discharge静电放电FFCFiber Connector光纤连接器FEFast Ethernet快速以太网FRFrame Relay 帧中继GGEGigabit Ethernet千兆以太网GNDGround接地,地HHECHeader Error Control信头差错控制IIMAInverse Multiplexing on ATM ATM反向复用IPInternet Protocol互联网协议、 网际协议ISDNIntegrated Services Digital Network综合业务数字网LLANLocal Area Network局域网，本地网MMACMedia Access Control媒体接入控制MDFMain Distribution Frame总配线架MMXMain Multiplexer card主复接板MONMONitor监控模块NNNINetwork Node Interface 网络-网络接口nrt-VBRNon-Real Time Variable Bit Rate 非实时可变比特率OOAMOperation Administration and Maintenance运行管理和维护PPDHPlesiochronous Digital Hierarchy 准同步数字系列PGNDProtection Ground保护地PHYPhysical Sublayer & Physical Layer物理子层,物理层POTSPlain Old Telephone Service普通电话业务PSTNPublic Switched Telephone Network 公用交换电话网QQoSQuality of Service; Quality of Service业务质量RRSPRemote Subscriber Processor远端用户处理板rt-VBRreal time Variable Bit Rate实时可变比特率SSARSegmentation And Reassembly分段和重组、分割重组SDHSynchronous Digital Hierarchy同步数字体系、同步数字系列SDTStructured Data Transfer结构化数据传输SEPSystem ExPand card系统扩展板SMBSystem Management Board系统管理板SOHOSmall Office and Home Office小办公室和家庭办公室SP18XE1 Interfaces Unit8路E1电接口板SP216XE1 Interfaces Unit (155/622H)16路E1电接口板（155/622H）SPLSPLitter语音分离器STM-1SDH Transport Module -1SDH传输模块 -1STM-4SDH Transport Module -4SDH传输模块 -4STPSignaling Transfer Point信令转接点TTDMTime Division Mulitiplex(ing)时分复用UUBRUnspecified Bit Rate未指定比特率UNIUser Network Interface用户网络接口UTOPIAUniversal Test & Operations PHY Interface for ATMATM（的）通用测试和操作物理接口UTPUnshielded Twisted Pair非屏蔽双绞线，无屏蔽双绞线VVCIVirtual Channel Identifier虚通路标识VDSLVery High Speed DSL; Very High