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.

youdao

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.

youdao