探讨了NGN网络测试中的性能测试技术，重点阐述了呼叫性能测试技术；介绍了语音质量的测试原理、测试规范、测试方法和测试参数；对NGN网络的维护进行了比较简单的讨论，阐述了运营商的两种网络维护模式的相同和不同之处，以及如何应用。-Discusses the NGN network testing the performance test technology, focusing on the call performance test techniques　introduced the voice quality of the test theory, test specifications, test methods and test parameters　for the maintenance of NGN networks were compared to a simple discussion, elaborated The two network operators in maintenance mode the similarities and differences, and how to apply.