Twenty-five years ago, when Tracy Nolan began her career as a dispatcher with the Buena Park PD, answering 911 calls was very different than it is today. Back then, virtually all emergency calls came from landlines; only a fraction came from what now seem like brick-sized mobile phones, compared to today’s amazingly powerful (and small) smart gadgets. Today, 80 percent of all 911 calls are made from mobile phones, says Nolan, citing a national statistic. Nolan now is administrative supervisor at the Metro Net Fire Dispatch call center in Anaheim, which in addition to Anaheim handles fire emergency phone calls…