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• ITU-T Rec. X.140 (1988)
• 1 Scope and application
• 2 Parameter definitions
  • 2.1 access parameters
  • 2.2 User information transfer parameters
  • 2.3 disengagement parameters
  • 2.4 Availability parameters
• 3 Distinguishing network and user components of performance
  • 3.1 Network-user responsibility transfer
  • 3.2 User-network responsibility transfer
  • 3.3 Use of the responsibility transfer events
• 4 Supplementary information
  • 4.1 Scope of application
  • 4.2 Statistical meaning
• ANNEX A – Relationships between the general QOS parameters and the circuit-switched service performance parameters
• ANNEX B – Relationships between the general QOS parameters and the packet-switched service performance parameters
• ANNEX C – Relationships between the general QOS parameters and the OSI network layer service performance parameters