• ITU-T Rec. Q.780 (1988)
  • 1 General
  • 2 General principles of test specifications
  • 3 Scope of the test specification
  • 4 Field of application
  • 5 Method of application
    • 5.1 Validation testing
    • 5.2 Compatibility testing
    • 5.3 Test configuration
  • 6 Functional requirements imposed by the test specification
    • 6.1 Level 1
    • 6.2 Level 2
    • 6.3 Level 3
    • 6.4 TUP
  • 7 Signalling link monitor(s)