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- PSDDS Public Switched Digital Data Service 公用交换数字数据业务
- private circuit digital data service 专用电路数字数据业务
- international digital data service 国际数字数据业务
- public switched digital data service 公用交换数据业务
- switched digital data service 数字数据交换业务
- digital data service adapter 数字数据服务转接器
- digital data service 数字数据服务
- No conversion from analogue to digital data is needed. 没有必要把模拟转换为数字数据。
- The earthquake events database system of China Digital Seismograph Network (CDSN) is a software system for data service. 中国数字地震台网(CDSN)地震事件数据库系统是一个数据服务软件系统。
- ISDN is the only mass-deployed, high-speed data service available today. ISDN是今天能获得的唯一大量部署的高速数据业务。
- CK Composite with Check Digits data type. 具检核值的合成资料型态。
- ISDN is the only mass-deployed,high-speed data service available today. ISDN是今天能获得的唯一大量部署的高速数据业务。
- A method is presented to transmit voice and fax on Digital Data Network (DDN) leased lines which guarantees high quality and real time service in a narrowband network. 针对窄带数字网络中传输传统语音业务的质量和实时性问题 ,提出了一种在数字数据网络 (digital data net-work,DDN)专线上传输高质量语音和传真的解决方案。
- Digital data are encoded by means of pits on the recording layer of the disc. 对数字化资料进行编码，是通过光盘记录层面上的凹坑来实现的。
- The MPEG ?2 and DVB standard had made the digital cable network that can implements digital video service, broadband data service as well as interactive service. MPEG-2 标准、DVB 系列标准的完善,数字有线网络已经成为能容纳数字视频业务、宽带数据业务、交互业务的网络。
- The network (air) interface between a Mobile End System (M-ES) and the Cellular Digital Packet Data (CDPD)-based wireless packet data service provider network. 移动终端系统(M-ES)和基于蜂窝数字分组数据（CDPD)之间的网络（空中）接口，基于无线分组数据业务提供商网络。
- Allows packages to be saved to Meta Data Services (the Repository). 允许将包保存到元数据服务(存储库)。
- The left and right channels are combined to one digital data string via a multiplexor. 通过多路转换器将左右声道合成一个声道。
- Data bits are allocated to the channels through a highly efficient modulation technique that converts digital data to electrical signal pulses. 数据通过一种高效的调制技术（即把数字数据变成电信号脉冲）分配给各个信道。
- Digital Data Network(DDN) is a data network designed to transmit data on digita! channels. 数字数据网(DDN)是利用数字信道来传输数据信号的数字传输网。
