5000, Calling the Demo Example IVR
IVR, Interactive Voice Response, self attendant, personal attendant, voice menu, voice tree, is one of the things this bizarre society of last decades has made all of us extremely familiar with. From call centres to voice mail systems, from the wakeup call of our youth (our fathers' youth?) to airport information systems, we're used to interact with a (synthetic?) voice through the digits we press on the dialpad.
So, call 5000 from one of the phones and interact with a simple but complete IVR, with many options, menus and submenus. Some of the choices you can make from the demo IVR are also extensions in their own right.
For example, if you press "3" on the dialpad under the hood you'll be transferred to the "9664" extension, listening to music on hold. If you press "2", you'll be transferred to the "9196" extension, that will echo your voice back to you (useful to establish how much network delay for the back and forth voice trip).
We'll see more on how to build an IVR, and how the demo IVR has been built, later in the book. For the time being, let's play with it.