Twilio has added asynchronous call redirection to its REST API, allowing developers to control calls in real-time. This feature enables advanced use cases such as call queuing, call centers, and enterprise applications. With this API, developers can put calls on hold, transfer calls between different TwiML documents, or hang up on callers by making simple REST requests. The API provides a wide range of possibilities for customizing the caller experience, including playing hold music, dialing external numbers, and executing specific TwiML instructions. This feature is accompanied by extensive documentation, example code, and resources to help developers get started with integrating call redirection into their applications.