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  • Patch Set #3, Line 23: connection receives RTP in case of a conference.

    I'm still not really understanding this paragraph sorry :/ […]

    Sending and receiving is from the MGW point of view. This is how the modes are named.

    RTP may be received from multiple connection at a time. This is true for a point to point conversation. In this case there is only one destination connection for the RTP, the other connection. This is because there is no echo, the receiving connection does not echo it back.

    In cases of conference or having additional echo (confecho), it may be possible that a connection must mix RTP from different (receiving) connections. In case of two confecho connections, the two connections receive audio at a time and both connection must send the mixed RTP. This would only be possible with transcoding. This is currently not possible. In this case the MSC must switch the mode so that only one connection receives RTP and no mixing is required. In case of a conference, the talking connection is switched to receive RTP only (or confecho), all other connections are switched to send RTP only.

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