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• ITU-T Rec. Q.71 – ISDN 64 kbit/s CIRCUIT MODE SWITCHED BEARER SERVICES
• 1 Introduction
  • 1.1 General
  • 1.2 Definitions of services
  • 1.3 Service invocation
• 2 Call set-up and release
  • 2.1 Functional model
  • 2.2 Information flows required for en-bloc and digit-by-digit ...
  • 2.4 Functional entity actions
  • 2.5 Additional FEAs required for digit-by-digit call setup cases:
  • 2.6 Allocation of functions to physical entities
• 3 In-call modification procedures for alternate speech/unrestricted ...