Voice Scenario 3
Voice scenario 3 involves reINVITEs. The following ingress and egress policies are used for scenario 3.
| Ingress Policy | Egress Policy | ||
|---|---|---|---|
| allow-codecs | PCMU G729 | allow-codecs | * |
| add-codecs-on-egress | add-codecs-on-egress | PCMA | |
| order-codecs | order-codecs | ||
| force-ptime | disabled | force-ptime | disabled |
| packetization-time | packetization-time | ||
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In the following diagram, the answerer sends a reINVITE after a previous transcoding session was established. The original offerer and answerer swap roles. The new offerer rejects the SDP offer and the call reverts to the state negotiated in the original SDP negotiation.
