A. ONE HUNDRED AND ELEVEN(111)CTNS OF PLASTIC BUTTONS B. ONE HUNDRED AND ELEVEN CTNS OF PLASTIC BUTTONS C. 111 CTNS OF PLASTIC BUTTONS D. ONE HUNDRED AND ELEVEN (111) PLASTIC BUTTONS
A. 终端复用器TM(Terminal Multiplexer) B. 分插复用器ADM(Add/Drop Multiplexer) C. 数字交叉连接设备DXC(Digital Cross Connect) D. 再生中继器REG(Regenerator) E. 网络管理系统NMS(Network Management System)