SIP .NET > Tutorial > Conference call - Third party is added
In this example is shown how Bob is capable of media mixing in a 3-party call:
- Alice calls Bob.
- Bob wishes to add Carol into the conversation.
- Bob first sends a re-INVITE to Alice, changing the Contact URI to one that indicates Bob as a mixer and acting like a focus.
- Bob then INVITEs Carol using the same Contact URI.