基于JAVA实现的呼叫控制应用程序编程接口 (JCC).建立了标准呼叫模型，实现了呼叫控制的完整状态机，并提供编程接口。-JAVA-based call control to achieve application programming interface (JCC). Establish a standard call model, to achieve a complete call control state machine, and provides a programming int