The core technology of such equipment has the cross connecting capability of the high capacity vc - 4vc - 4 - nc or vc - 4312vc - 12 - nc and provides large numbers of optical line interfaces of different rates and perfect network protection and recovery functions 该设备的核心技术及功能是具备大容量的vc - 4vc - 4 - nc或vc - 4312vc - 12 - nc交叉连接能力，具有大量的各种速率的光线路接口，具有完备的网络保护及恢复功能。
