Motorola Solutions DAS Education

When a first responder enters a building, can they communicate on their radios? In the case of an emergency it is crucial that all buildings support wireless communication for first responders, such as the Police, Fire, and EMS. National and international fire codes now mandate that all new and existing buildings have full wireless coverage indoors within 99% of all critical areas. Additionally, each municipality and Authorities Having Jurisdiction (AHJ) also requires a unique set of requirements for public safety communications. When do you need it?

An Indoor Distributed Antenna System (DAS) allows the reception from, and transmission to, the outdoor Public Safety radio system from anywhere inside of a building, structure, tunnel, etc.


Passive DAS – Coax used to distribute RF signals

  • Only active component – BDA/Repeater
  • Ideal solution for smaller venues <150K sq/ft
  • Limited growth or expansion capability

Active DAS – Adds RF conversion, fiber, and distributed amplifiers

  • Scalable – Single to multi-band/operator installations
  • Cost effective multi carrier coverage over 150,000 sq/ft
  • Flexible for growth and expansion
  • One system for Land Mobile Radio, 700/800 Public Safety, and 900 SMR

Designs that requires compliance to the NFPA-1221 codes for Public Safety become very stringent in the equipment and installation processes as the equipment must meet certain survivability requirements.