Next, we can build the SIP INVITE request and send it to the first server.
接下来，我们将构建SIPINVITE请求，并将其发送到第一台服务器。
The SIP proxy at ibm.com has to locate the example.com server to forward the request onto example.com.
的SIP代理必须定位 example.com服务器，以将请求转发到 example.com。
The SIP proxy at ibm.com has to locate the example.com server to forward the request onto example.com.
的SIP代理必须定位 example.com服务器，以将请求转发到 example.com。
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