Several years ago someone had broken into our home just before my wife arrived home from work. She called me from a neighbor's house right after she called the police. It took me 1 1/2 hours to arrive home because of distance and traffic conditions. I beat the police; and, they only had to drive two miles.
A few years later I was home alone follwing back surgery. I was awakened when someone entered my home. I called "911", then hid in the shower stall with merely a .22 rifle. The intruder apparently left when I yelled when he came into the bedroom. This time the police never showed up; and, those dolts at the "911" center told me that they cancelled the call because I didn't stay on the line.
I have an number of "defensive devices" in my home now. It is obvious that "911" is a joke. It only takes an intruder 30 seconds to come face to face with the homeowner. I will not be the one they draw the chalk line around.
Through several acquaintances I have been told that the quickest way to get a reponse from 911 was to call give your address and hang up the phone.
Secondly, nothing seems to get the attention of a home invader faster than the sound of racking a shell in a pump shotgun.