It is great. I think they got there by extrapolating a home phone
interrupting dinner table conversations, and similar. The urgency of a ringing phone dominating all else. Like a fire alarm alerting that this is the most important conversation to be had!
I see, but is that different from a slightly more quiet ring tone? The point of setting mobile phones to vibrate is that (ideally) you can feel it (because you have it in your pocket) without others arround you being interrupted.
Sure. Many home DECT phones are small enough to pocket or have belt clips. If it is on a desk or nightstand next to you the vibration will be noticed though.
