>> reporter: many of the calls go to the wrong 911 center. >> our most important question is what is the location of your emergency? >> reporter: current technology uses cell towers to determine where you are, the tower your phone pings may be miles away or even in another jurisdiction. i'm going to have to transfer you to the city of roswell, okay, you are out of our jurisdiction. >> reporter: we conducted the test call standing outside the alpharetta 911 center where there were at least three misdirected 911 calls in the two hours we were there. >> what is the address of your emergency? >> reporter: this is jonathan serrie of fox news doing a test. what address is showing up on the computer? >> showing cell tower location at 3129 old milton parkway. >> reporter: more than a mile away from where i was standing, we conducted a second test using technology from the start-up laser 911. >> you can please tell me the address that popped up on the screen? >> reporter: the 911 operator pinpointed our exact location immediately. >> your phone very good at