2．2  缩略语    AI(Analog Input)模拟量输入(模入)    AO(Analog Output)模拟量输出(模出)    ATM(Asynchronous Transfer Mode)异步传输模式    BAS(Building Automation System)楼宇自动化系统    BD(Building Distributor)建筑物配线设备(架)    BMS(Building Management System)建筑设备管理系统    CD(Campus Distributor)建筑群配线设备    CP(Consolidation Point)集合点    DDC(Direct Digital Control)直接数字控制器    DI(Digital Input)开关量(数字量)输入(开入)    DO(Digital Output)开关量(数字量)输出(开出)    FAS(Fire Alarm System)火灾自动报警系统    FD(Floor Distributor)楼层配线设备    ISDN(Integrated Services Digital Network)综合业务数字网    I/O(Input/Output)输入/输出    KB(Kilobyte)千位(千字节)    LED(Light Emitting Diode)发光二极管显示    NTU(Network Terminal Unit)网络终端设备    PLC(Programmable Logic Controller)可编程序逻辑控制器    PSTN(Public Switched Telephone Network)公用电话网    RAM(Random Access Memory)随机读写存储器    ROM(Read Only Memory)只读存储器    SAS(Security Protection ＆ Alarm System)安全防范系统    SPD(Surge Protect Device)电涌保护器    TCP/IP(Transmission Control Protocol/Internet Protocol)传输控制协议/网际协议    TE(Terminal Equipment)终端设备    TO(Telecommunication Outlet)信息插座    VLAN(Virtual Local Area Network)虚拟局域网