同步互穿网络
simultaneous interpenetrating networks
Simultaneous interpenetrating network
互同步网
mutually synchronized network
分层次同步网络
HSN Hierarchical Synchronized Network
阶层式同步网络
hierarchically synchronized network
时间同步网络
time synchronization network
数字同步网络
SDH
digital synchronization network
同步网络管理
synchronization network managemen
网络同步
network synchronization
NS Network Synchronization
网络同步传输技术
network synchronous transmit technology
网络同步技术
network synchronization technique
网络同步子系统
NSS Network Synchronization Subsystem