DAS/In-Building Coverage

There are over 900 properties in King County that have public safety Distributed Antenna Systems (DAS). These DAS rebroadcast the emergency radio signal within their properties to provide coverage for first responders. Properties with DAS in King County tend to have been built in the last ten years, are greater than 100,000 square feet, and/or use energy-efficient insulation, such as mixed-use residential buildings, tall office buildings, schools, hospitals, and corporate campuses. First responders in King County have transitioned to using PSERN and with this change, properties with public safety DAS are legally required to take action to remain compliant. More information for DAS properties can be found here:

• DAS Equipment
• DAS Properties
• DAS Legal Requirements
• DAS Migration Process
• DAS Vendors
• FAQ