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TechSpec
  • Foreword
  • Introduction
  • 1 Scope
  • 2 References
  • 3 Definitions and abbreviations
  • 4 General Functions
  • 5 Considerations for each host environment
  • A.1 GTT-Voice specific information for CTM support in, or associated with, all transcoders in the access network for GSM networks with A-interface
  • A.2 GTT-Voice specific information for CTM support in or associated with all transcoders in the core network for networks supporting the Iu interface
  • B.1 GTT-Voice specific information for CTM support in GSM networks with A-interface, via access network circuit pooling
  • B.2 GTT-Voice specific information for CTM support via core network termination selection for networks using Iu interface
  • C.1 Emergency calls
  • C.2 Routing of regular user calls
  • C.3 Routing actions of the CTM-SCP
  • C.4 Routing actions of the CTM-SRF
  • C.5 Service interactions

C.4 Routing actions of the CTM-SRF

23.2263GPPGlobal Text Telephony (GTT)Release 17Stage 2TS

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

Figure C.9: Routing logic in CTM-SRF for Mobile terminated calls

Figure C.10: Routing logic in CTM-SRF, for Mobile Originated calls