You must maintain HTML pages that will be served to callers who will receive Basic callback in response to a Web request. We provide several samples of Basic Callback pages:
bostoncallonly.html
sanjosecallonly.html
Note that these forms retrieve the caller's name and phone number from callform.html, and place it in the text.
A Collaboration session is not initiated; instead, Trailhead stores each request and Media Blender then retrieves the requests and queues them to the switch.