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circuit switched digital network 线路切换式数字网
integrated switched digital network 综合数据交换网
public switched digital network 公共交换数字网
switched digital video network 交换式数字视频网络
packet switched digital data network [计] 分组交换数字数据网
Packet Switched Digital Network 包交换数字网
SDVN Switched Digital Video Network 交换式数字视频网络
Definition of: ISDN (Integrated Services digital Network) an international standard for switched, digital dial-up telephone service for voice and data.
定义：ISDN(综合服务数字网络)，是一个国际转换标准，是为了语音和数据的数码拨号上网电话服务。
The limited transmission rate available on the Public switched telephone network (PSTN) and on wireless networks presents a significant challenge to digital video communications.
这些应用对传输速率有限的公共交换电话网(PSTN网)和无线网络提出了重大挑战。
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