基于NTP协议构建大规模网络的时间同步网时，必须在网络每一节点上事先进行参数配置，如同步源地址等。
It is necessary for every node in large scale networks to set configuration parameters like timekeeping peers addresses, while constructing a timekeeping network based on NTP (network time Protocol).
TD MA网络是一种同步网络。必须有统一的时间基准，各站点的时隙必须与时间基准同步。
TDMA network is a kind of synchronization network and must have unitive time benchmark and the time slot of node must synchronize with time benchmark.
利用SDH网络组建全国的时间同步网，需要研究s DH网络传递路径的时延和时延误差。
To build nationwide synchronized time net using SDH network, we must study the time delay in SDH network transmission path.
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