Content for TS 29.235 Word version: 17.0.0
6 Interworking between a SIP-I based circuit-switched core network and a BICC based network
6.1 Reference Model
6.2 Control Plane Interworking
6.3 Signalling Interworking of a Call from the BICC based network towards the SIP-I based circuit-switched core network
6.4 Signalling Interworking of a Call from SIP-I based circuit-switched core network towards the BICC based network
6.5 Supplementary services
6.6 Codec Negotiation between a BICC based network and a SIP-I based circuit-switched core network
6.7 DMTF Signalling Interworking applicable for all Calls between a BICC network and a SIP-I based circuit-switched core network
6.8 User Plane Interworking
6.9 Example Call flows
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6 Interworking between a SIP-I based circuit-switched core network and a BICC based network p. 40
6.1 Reference Model p. 40
6.2 Control Plane Interworking p. 41
6.2.1 General |R9| p. 41
6.2.2 Signalling interactions between network entities in the control plane |R9| p. 41
6.3 Signalling Interworking of a Call from the BICC based network towards the SIP-I based circuit-switched core network p. 42
6.4 Signalling Interworking of a Call from SIP-I based circuit-switched core network towards the BICC based network p. 42
6.5 Supplementary services p. 42
6.6 Codec Negotiation between a BICC based network and a SIP-I based circuit-switched core network p. 43
6.6.1 General p. 43
6.6.2 Codec Negotiation from SIP-I on Nc to BICC Network p. 43
6.6.2.1 Sending of IAM p. 43
6.6.2.2 Sending of SDP Answer p. 43
6.6.2.3 Mid-call Codec Negotiation initiated from SIP-I on Nc p. 43
6.6.3 Codec Negotiation from BICC Network to SIP-I on Nc p. 43
6.7 DMTF Signalling Interworking applicable for all Calls between a BICC network and a SIP-I based circuit-switched core network p. 44
6.7.1 General p. 44
6.7.2 DTMF transfer from SIP-I on Nc to BICC network (Out-of-Band DTMF) p. 44
6.7.3 DTMF transfer from BICC network (Out-of-Band DTMF) to SIP-I on Nc p. 45
6.7.4 SIP-I on Nc interworking with BICC for Inband DTMF p. 46
6.8 User Plane Interworking p. 46
6.8.1 General p. 46
6.8.2 DTMF Interworking p. 46
6.9 Example Call flows p. 46
