There are no formal rules or recomendations on how to hot-change an in course conference. The implementators are free to do what they think that are the necessary for that. For the purpose of compatibility with end points of other vendors, the simplest way is to close all connections and re-negotiate the capabilities.

2008/4/24 Bian bianxg@yahoo.cn:

Hi

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

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