Over the past 18 months, dealers and integrators have witnessed the residential security market undergo a dramatic transformation with the entry of such well-known names as AT&T, Comcast, Verizon and Time Warner. Even retailers Lowe’s and Best Buy have announced residential security and automation offerings. The timing of their arrival is no accident: Research firm Parks Associates estimates revenue from connected home and security monitoring services will grow from $9.4 billion in 2011 to $13.8 billion by 2016.