"Well its said a Terminator doesn't really HAVE a life," Turk replied. "Because they can never be sure when they'll be activated for a mission few can balance a home life with vanishing for days on end with little or no warning. Often their only contact with the outside world will be their handler, an agent who any missions will be passed to them through. I'm guessing that's what Fizz's job is, that would explain why she knows how to contact Tyler and Izzy doesn't."