9.6 Codec Negotiation Example Sequences

23.1533GPPOut of band transcoder controlRelease 17Stage 2TS

The following figures show examples of codec negotiation for a selection of common call scenarios to highlight the principles agreed in the preceding clause; the sequences are not exhaustive.

Figure 9.6.1: Mobile Originating Codec Negotiation

Figure 9.6.2: Mobile Terminating Codec Negotiation – External Node supports OoBTCIndicator

Figure 9.6.3: Mobile Terminating Codec Negotiation – External Node does not support OoBTCIndicator

Figure 9.6.4: Codec Negotiation during call forwarding outside of PLMN – external incoming node does not support 3G OoBTCIndicator

Figure 9.6.5: Codec Negotiation during call forwarding outside of PLMN – external node supports 3G extension

Figure 9.6.6: Mobile Originating Codec Negotiation with specific codec examples

Figure 9.6.7: Mobile Terminating Codec Negotiation with specific codec examples