The function can be called on page and item nodes as well as form nodes.
可以在页面和条目节点以及表单节点上调用这个函数。
After the initial INVITE, this application will be called on every subsequent SIP message.
完成初始invite后，将针对每个后续SIP消息调用此应用程序。
After the initial INVITE, this application will be called on every subsequent SIP message.
完成初始invite后，将针对每个后续SIP消息调用此应用程序。
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