5.2 QS & QC
Two parameters could be used to monitor the quality of a channel. One is the quality of source (QS) and another is the quality of client network (QC).
QS stands for the quality of the channel source. Low QS value means the SopServer does not receive enough channel content, and it will result in the poor quality of all viewers. If you feed the channel with an external media server's stream, and SopServer presents the poor QS, you should check the connection between SopServer and the media server to see whether the connection can transfer the stream data efficiently and integrally.
QC stands for the average buffer level of all viewers. The high QC value means the p2p network is working greatly and every watcher can receive most of the channel content in its buffer. If a channel has a low QC, you can check
1) whether the SopServer have enough bandwidth to support the p2p distribution.
2) whether most peers in p2p network have not good internet access to share the stream data.
On SopServer, when a channel is broadcasting, you can monitor QS in "server status info" area. You can click the blue "quality bar" on WebPlayer or SopPlayer to see the quality of a channel, QC.