Design, installation and service of the Announcement Control System which handles more than twelve thousand announcements daily. Audio and video systems in the Commission Chambers; local audio and video system for recording and streaming. Room includes a T-Coil system for assisted listening. The upgrade completed in 2018 will make this public address system one of the largest IP based audio systems in the world. Service of Call for Assistance Stenofon system in the MAC parking ramps with strobes and over 700 intercom station for emergency communication. Our relationship with the Minneapolis-St. Paul Airport dates back to the late 90’s.