What is the standard way to switch a point-to-point conference to multi-party conference? (The condition is that the codec used in multi-party conference is not same as that in point-to-point call, for example, when in p2p call the endpoint communicate using H.264, and in multi-party confernce they use H.263 codec )

The SONY PCS endpoint's method is that the ep close all logical channels and re-issue capability, then re-open logical channel.

I don't know if this is a standard method and if can cooperate with other endpoints.

regards,

bian