软交换技术是下一代网络的核心。软交换呼叫服务器将传统交换机中的呼叫控制与承载部分分开；应用服务器将业务与呼叫控制分离。软交换的体系架构主要由呼叫服务器、媒体/中继网关、信令网关和应用服务器组成。它建立在宽带分组网络基础设施上，系统单元间采用标准接口。其开放 Softswitch technology is the core of next generation networks. Softswitch call server separates the call control from the bearer in the traditional switchboard; the application server separates the business from the call control. Softswitch architecture mainly by the call server, media / trunking gateways, signaling gateways and application servers. It is built on a broadband packet network infrastructure using standard interfaces between system cells. It’s open