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DECT:Digital Enhanced Cordless Telecommunication增强数字无绳通讯DFB:Distributed Feedback 分布反馈DID:Direct Inward Dialing 直接中继方式，呼入直拨到分机用户DLC:Data Link Control Layer 数据链路层DLI:DECT Line Interface DODI:Direct Outward Dialing One 一次拨号音DPH:DECT Phone DRC:Directional Response Cahracteristics 指向性响应DS:Direct Sound 直正声DSP:Digital signal Processing 数字信号处理DSS：Deiision Support System 决策支持系统DTMF:Dual Tone Multi-Frequency 双音多频DTS:Dual -Technology Sensor 双鉴传感器DWDM:Dense Wave-length Division Multiplexing 密集波分复用DXC:Digital Cross-Connect 数字交叉连接 ?E:Emergency lighting照明设备E:Equalizer 均衡器E:Expander 扩展器EA-DFB:Electricity Absorb-Distributed Feedback 电吸收分布反馈ECC:Embedded Control Channel 嵌入或控制通道EDFA:Erbium-Doped Fiber Amplifier掺饵光纤放大器EDI:Electronic Data Interexchange 电子数据交换EIC:Electrical Impedance Characteristics 电阻抗特性EMC：Electro Magnetic Compatibiloty 电磁兼容性EMI:Electro Magnetic Interference 电磁干扰EMS:Electromagnetic Sensitibility 电磁敏感性EN:Equivalent Noise 等效噪声EP:Emergency Power 应急电源ES:Emergency Sooket 应急插座ES:Evacuation Sigvial疏散照明 ESA:Error SecondA 误码秒类型ＡESB:ErrorSecondB 误码秒类型ＢESD:Electrostatic Discharge静电放电ESR:Errored Second Ratio 误码秒比率ETDM:Electrical Time Division Multiplexing电时分复用ETSI:European Telecommunication Standards Institute欧洲电信标准协会 F:Filter 滤波器FAB:Fire Alarm Bell 火警警铃FACU:Fire Alarm Contrlol Unit 火灾自动报警控制装置FC:Failure Count 失效次数FC:Frequency Converter 频率变换器FCC:Fire Alarm System 火灾报警系统FCS:Field Control System 现场总线FCU：Favn Coil Unit风机盘管FD:Fire Door 防火门FD:Flame Detector 火焰探测器FD:Floor DistributorFD:Frequency Dirsder 分频器FDD:Frequency Division Dual 频分 双工FDDI：Fiberdistributed Data Interface光纤缆分布式数据接口。FDDIF:Fiber Distributed Data Inferface光缆分布数据接口 FDMA:Frequency Division Multiple Access频分多址FE:Fire Extirguisher 消防电梯FEBE:Far End Block Error远端块误码FEXT:Far End Crosstalk 远端串扰FFES:Foam Fire Extionuishing System泡沫灭火系统 FH:Fire hydrant 消火栓FI:Fee Indicator 费用显示器FL:Focal Length 焦距FL:Fuzzy Logic 模糊逻辑FM:Faiilt Management失效管理FPA:Fire Public Address 火灾事故广播FPD: