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TechSpec
  • Foreword
  • 1 Scope
  • 2 References
  • 3 Definitions and abbreviations
  • 4 Introduction
  • 5 Void
  • 6 Network Characteristics
  • 7 Interworking classifications
  • 8 Compatibility and subscription checking
  • 9 Interworking to PSTN
  • 10 Interworking to the ISDN
  • 11 Interworking between A/Gb mode MSC and Iu mode MSC
  • 11a Transport Protocols
  • 12 Frame Synchronization
  • 13 Call Clearing
  • 14 The A-TRAU Framing Protocols
  • 15 RTP Payload Type Negotiation for Data Calls within a SIP-I based CS Core Network
    • 15.1 RTP payload type negotiation at access side of IWF
    • 15.2 RTP payload type negotiation at network side of IWF
      • 15.2 RTP payload type negotiation at network side of IWF
    • C.1 Scope
    • C.2 RTP payload Type definition
    • C.3 Describing the RTP payload Type in SDP
    • C.4 SDP Offer-Answer considerations
    • C.5 SDP Example
    • D.1 Introduction
    • D.2 IANA Registration information

15.1 RTP payload type negotiation at access side of IWF

29.0073GPPGeneral requirements on interworking between the Public Land Mobile Network (PLMN) and the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN)Release 17TS

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

For any data call, the SDP offer shall contain a single m-line with only the CLEARMODE payload type (see IETF RFC4040 [92]). In addition, the ISUP IAM encapsulated in the INVITE to set up the corresponding call leg shall contain TMR UDI.