2.2,缩略语,AC、Access.Control,List、访问控制列表,BHCA.Busy.Hour,Call.Attempts,忙时呼叫尝试次数。ID.Identification,身份证明 IP,Internet,Protocol、互联网协议。LPZ.Lightning,Protection,Zone.雷电防护区.MAC,Media,Access。Control,媒体控制访问。MPLS。Multi,Protocol,Label。Switching,多协议标签交换.MSTP.Multi、Service。Transmission,Platform.多业务传送平台。NAT、Network,Address、Translation.网络地址转化,NTP.Network、Time Protocol。网络时间协议 OTDR,Optical.Time Domain Reflector,光时域反射仪,PDH Plesiochronous Digital,Hierarchy。准同步数字系列。PTZ,Pan Tilt,and,Zoom control。云台操控 PRBS。Pseudo、Random、Binary、Sequence.伪随机二进制序列,QoS,Quality、of Service,系统服务质量,SDH、Synchronous,Digital,Hierarchy,同步数字系列。STM,N Synchronous,Transport,Module。level.n、同步传输模块n级。UPS.Uninterruptible,Power Supply。不间断电源.VLAN。Virtual.Local,Area,Network、虚拟局域网.VPN.Virtual,Private。Network 虚拟专用网