要启动与客户的共同浏览会话，客户服务代表可以访问的一个页面必须有一种方法来监听进入的呼叫并发起这样的会话。

To start a co-browsing session with the customer, a page accessible by the customer service rep must have a way to listen for incoming calls and initiate such sessions.

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使用SIP可以启动呼叫和即时消息会话。

The call and instant messaging session could be initiated using SIP.

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现在我们已经有了地址，并准备好启动呼叫，我们还需要设置SIP请求。

Now that we have the addresses and are prepared to initiate a call, we need to set up the SIP request.

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