Denver International Airport (DIA) is the fifth-busiest airport in the United States and the thirteenth busiest airport in the world. It is the largest airport site in North America and the second largest in the world with a property of 53 square miles. While opened in February 1995, design began in the late 1980's and DIA's fire alarm system was designed and installed based on the 1990 National Fire Alarm Code. Faced with the need to replace the existing fire alarm system, DIA management determined to update their notification system in accordance with the 2010 National Fire Alarm and Signaling Code, including Chapter 24 for Emergency Communication Systems. Utilizing a number of existing systems at DIA, an integrated Emergency Communication System has been implemented to coordinate audible announcements with video displays for the hearing impaired throughout the Complex. This new system allows for coordinated messages for both fire and non-fire events. This presentation will address the requirements of NFPA 72 Chapter 24, the steps necessary to integrate the existing systems into a coordinated ECS, challenges to system implementation, technological options, and general system functionality.