网络释义
1)Digital Cross Connect System Equipment(SDH-Based),同步数位阶层数位交换连接系统设备2)Digital Cross Connect System Equipment(SONET-Based),同步光纤网路数位交换连接系统设备3)digital cross connect Ssstem equipment(SDH-Based),同步数位阶层数位交换连接4)SDXC(Synchronous Digital Cross-connect),同步数字交叉连接设备5)Synchronous Digital Hierarchy(SDH ),同步数位阶层6)digital cross connectsystem equipment(SONET-Based),同步光纤网路数位交换连