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Ｔ．１２０ 建议包括一系列支持实时、多点数据通信及应用的协议。着重介绍多媒体会议数据建议Ｔ．１２０ 系列协议应用层文件传输（Ｔ．１２７）及其实现方案。
T. 120 recommendations include a series of protocols that support real-time, multi-point data communications and applications. Highlight multimedia conference data recommendations. 120 Series Protocol Application Layer File Transfer (T.127) and Its Implementation.