目前，多媒体网络教学系统(如语音教室)的一般做法是，采用一台计算机服务器和数台特制数字终端构成一个多媒体教学网络。
At present, the general method of composing a multimedia network teaching system, such as a voice classroom, is formed by a computer and several digital terminals which were specially made.
数字语音通信服务是CSCW应用系统的重要组成部分。
Digital audio communication service is an important component of CSCW applications.
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。
Definition of: ISDN (Integrated Services digital Network) an international standard for switched, digital dial-up telephone service for voice and data.
数字化的语音所经过的网络，除了对带宽和延迟有要求之外，还有什么参数影响它的服务质量？
Besides bandwidth and latency, what other parameter is needed to give a good characterization of the quality of service offered by a network used for digitized voice traffic?
数字化的语音所经过的网络，除了对带宽和延迟有要求之外，还有什么参数影响它的服务质量？
Besides bandwidth and latency, what other parameter is needed to give a good characterization of the quality of service offered by a network used for digitized voice traffic?
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