This standard specifies procedures for testing the transmission performance of installed information technology cabling in premises. These procedures apply to both balanced copper and optical fibre cabling. These test procedures may be used for: - acceptance testing against agreed cabling performance limits; - verification of specific application support; - the investigation of faults. These test procedures are not suitable for components or cable assemblies such as patch cords and equipment cords. For eact test procedure this standard specifies: a) test parameter; b) the test method(s); c) test system; d) test equipment; e) cabling interface adaptor; f) measurement procedure; g) calibration; h) interpretation of test results; i) documentation. Limits for the parameters under test are specified in relevant cabling and application standards.