MCPTT; Mission Critical Push-to-Talk is a new generation all IP based broadband networks communication solution aimed at authority usage.  Among new features are high level priorities between users and groups, strong encryption, high level interaction between IP networks and PTT solution itself. All in all, simulating existing radio networks authorities are using today, but improving a lot all kind of new services based on the fact of much more efficient technologies with less frequency band and extremely effective enduser devices.  Azetti Networks have been awarded first MCPTT project in Europe and we have now hands full of developping future PTT solution.