First Responder teams and law enforcement face serious risks every day to ensure the safety of others, but unreliable networks and bad communication can make their jobs even more dangerous. Firefighters, police, and rescuers need clear and continuous communication in order to act quickly and save lives. For these reasons, Full-Duplex systems like the APPI-Com are the ideal communication solution for first responders and security teams. Our solutions offer two-way conference-mode dialogue free from other radio interference, built-in security alerts, and powerful obstacle penetration.