MCPTx class services for operative information exchange in critical situations

The principles of realization of services intended for operative information exchange in critical situations are described. The predecessor of such services, known by the English term "Mission Critical Push to Talk" is focused on speech traffic. The paper discusses the qualitative evolution of this solution that is focused on the exchange of information of any kind that noticeably increases the value of the obtained information. A brief description of the hardware and software tools used, developed in the company where the authors of the paper work, is given. The directions of further research are discussed.