In this paper the test methodology has been expanded for evaluation of DSL broadband services. This is a new strategy for testing and considering different aspects of test. This strategy can precisely test various features of DSL broadband equipment and services which can be delivered by them in terms of different aspects of testing such as functionality, performance, conformance, etc. It was practically executed over a designed testbed in Iran Telecommunications Research Center (ITRC) where a lab named NGN Pilot exists. The introduced strategy has a hierarchical structure from the topmost level of testing including different categories to the bottommost level including detailed test topics and test cases. This paper elaborates how the strategy was designed and how it can be applied to a desired environment to compare different DSL scenarios with each other. The strategy can then be used by a service provider to help deciding which solutions can achieve the best outcome.