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High-speed links such as OC-48c and OC-192c links need to be used as backbone links of the Internet in order to accommodate rapidly increasing Internet traffic. Network experiments over a test bed are important to check new services and new applications perform well over high-speed Internet backbones. In order to the correct experiment results, it is important to use suitable background traffic at the network experiments. The existing traffic testers use MMPP(Markov Modulated Poisson Process) and MAP (Markov Arrival Process) as traffic models to generate background traffic. However, MMPP and MAP are so simplistic that the network experiments may produce misleading results. In order to solve the problem, we have developed an OC-48c traffic tester for generating and analyzing long-range dependence traffic because the traffic model is considered one of the most realistic traffic models. The traffic tester achieves the OC-48 rate traffic generation using the hardware logic, and enables the long-range dependence traffic generation using time series data of packets numbers orbyte numbers.