> For the complete documentation index, see [llms.txt](https://docs.didforsale.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.didforsale.com/voice-and-sms-apis/voice-and-sms/big-picture.md).

# Big Picture

The image below is the Big Picture. The visual representation of how the calls are handled between DIDforSale and API that’s located on your webserver.

![DIDForSale interaction with your Web Application](https://4161683604-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LUHjv4EwOoqWXb2by8A%2F-LVdgplN6_C5Wo8-q6d7%2F-LVdh5yvo443qhjiOaK1%2Fapi-response.jpg?alt=media\&token=cf8752f8-8b13-4528-b994-e8321f8d7884)