中国联通是中国三大电信运营商之一，提供集宽带、固话及移动通信业务为一体的全业务通信服务。
China Unicom is one of the leading telecommunication operators in China, providing integrated telecommunication service in terms of broadband, fixed-line and mobile communication.
B - ISDN网络所提供的最重要的宽带服务是高速数据通信服务及视频通信服务。
The most important of the broadband services to be provided through the B-ISDN are high-speed data communication services and video communication services.
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