• https://blog.csdn.net/u010901046/article/details/120026762

配置sip外呼xml
https://blog.csdn.net/xly_971223/article/details/84366126

阿里云

https://help.aliyun.com/document_detail/100329.html

VoIP网关

网络拓朴图
https://blog.csdn.net/weixin_36078354/article/details/112488161