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This paper presents measurements and analysis of broadband Internet access service networks using a highspeed IP meter with a GPS (Global Positioning System) timestamp component. The authors performed measurements of traffic in a commercial IPv6 access service on ADSL (asymmetrical digital subscriber line) as a typical broadband access service network. This paper describes the measurement configuration using the high-speed IP meter and reports asymmetrical characteristics of packet delay on ADSL access networks. It also presents the analysis results of multimedia applications in the Internet, and discusses the quality of service on Internet access service networks.