如果网络通讯持续存在问题，那么远程会话也可以在客户端断开连接之后继续操作。
If network communication problems persist, the remote session is able to continue operating while the client disconnects.
为了说明扩展的方法，本教程将演示通过扩展 Collaboration Dialog 和 Cobrowse 小部件来在 Web 协同浏览会话中实现即时通讯功能的过程。
To see how, follow this tutorial and extend the Collaboration Dialog and Cobrowse widgets to deliver instant messaging capability in a Web cobrowsing session.
IP电话是将语音数据通过分组网络传输的，用分组网络作为会话者的主要通讯信道。
IP phone transmits the voice data through the grouping network that is the main communication channel for the people in conversation.
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