> For the complete documentation index, see [llms.txt](https://docs.digitalsamba.com/reference/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.digitalsamba.com/reference/rest-api/telephony.md).

# Telephony

Sometimes you want to build integrations with external telephony providers like **Twilio** or **Sinch**.