S100信令网关既可以工作信令代理方式，又可以工作在信令转接方式下。

S100 signaling gateway can be used as a signaling agency and a signaling transfer point.

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媒体信令代理模式则是部署媒体信令代理到软交换控制网络与其它网络连接处，从而屏蔽软交换的核心设备；

For model of media-signal proxy, media-signal proxy is deployed at junction between Softswitch core network and other network, so that shield core devices in Softswitch;

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