Synchronization is the base of transferring data correctly in synchronous digital network, so synchronization technique is the key in the data transferring field.

在同步数字网络中，同步是数据流正确传输的基础，因此同步技术是数字传输领域的关键技术。

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Generic framing procedure(GFP) is a new brand of data-packet transmitting protocol on synchronous digital hierarchy(SDH), as well as on optical transport network(OTN).

通用成帧协议（GFP）不仅是光同步数字传输网上的传输协议，而且是光传输网上的新型数据包传输协议，它具有简单、多协议适配等优点。

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The system may be widely used in time synchronization in Synchronous Digital Hierarchy (SDH) communication network and exchange and other timing application cases.

该系统可应用于SDH通信网时间同步、交换机时间同步等高精度定时领域。

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Metro networks have phone gear like digital cross-connects, which manage high-and low-speed traffic, and synchronous optical network (Sonet) systems, which come from fiber-optic phone networks.

FORBES: The God Box