We have a system that shows some managers what their employees are currently doing. Part of that is showing the current phone state so the manager knows if now is a good time to listen in or help out.
But there's no way to give the managers an easy way to hop on that call, instead, they have to dial special star codes (*80,*81,*82) and then the user's extension. It's not a great experience.
Ideally, it'd be nice if there were API endpoints for interacting with those specific features but an acceptable workaround could be making it work if we start a call via API with some of those star codes in it.