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TechSpec
  • Foreword
  • 1 Scope
  • 2 References
  • 3 Definitions and abbreviations
  • 4 Description
  • 5 Normal procedures with successful outcome
  • 6 Exceptional procedures or unsuccessful outcome
  • 7 Interaction with other supplementary services
  • 8 Mobility aspects
  • A.1 Activation of a CCBS request
  • A.2 CCBS Recall
  • A.3 Interrogation
  • A.4 Deactivation
  • B.1 Roaming into networks or registering in network entities not supporting CCBS

A.3 Interrogation

22.0933GPPCompletion of Calls to Busy Subscriber (CCBS)Release 17Service description, Stage 1TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

Existing MSs shall use USSD to interrogate the service. The MMI is defined in TS 22.030[3].