Mission Critical Push-To-Talk (MCPTT) fosters a faster response and enhanced situational awareness in the event of a disaster. Frequentis and its technology partners, Austrian mobile radio provider A1, Italian LTE mobile core network provider Athonet and Spanish MCPTT application provider Nemergent, united to demonstrate the rapid establishment of safety-critical LTE communication infrastructure “at the network edge” during a serious incident. It was a breakthrough demonstration in mission-critical mobile services as it pioneered services based on the latest 3GPP standards such as MC-PTT.