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• ITU-T RECOMMENDATION I.251.4 (1988)
• 4 I.251.4 - Calling Line Identification Restriction
  • 4.1 Definition
  • 4.2 Description
  • 4.3 Procedures
  • 4.4 Network capabilities for charging
  • 4.5 Interworking requirements
  • 4.6 Interaction with other supplementary services
  • 4.7 Dynamic description