说明：  语音通信控件组播版集成G729A压缩算法，实时传输协议，支持一对多（广播式）的实时通话，话音清晰流畅 适合于多媒体语音教室、会议、工厂、商场等场所！与转发模式相比更能节能网络带宽，减少延时！使用简单方便！
(Voice communication control MulticastVersion, Integration G729A compression algorithm, real-time transport protocol to support one-to-many (broadcast) the real-time calls, voice clear and smooth voice is suitable for multi-media classrooms, meeting, factories, shopping malls and other places! Forward mode and network bandwidth compared to more energy-efficient to reduce the delay! The use of simple and convenient!)