Entropia is a wireless mission critical Mobile Network Operator for professional critical organisations and is located in the surroundings of Bruges (Belgium), Moordrecht (The Netherlands) and London (United Kingdom). ComBus is Entropia's mission critical dispatching cloud together with Combonet, a dedicated broadband business critical solution. https://www.entropia.eu By applying the digital radio communication technology, the network is optimised for both critical voice- and data communications between wireless devices and to a central point, the control room named ComBus, broadband service Combonet. https://www.combonet.eu ComBus Push-to-Talk is a new global service where Entropia is now available offering global 3GPPbcoverage services. For more information, please follow our Services Push-to-Talk section on our website https://www.combus.eu Sharing of unwanted users is eliminated and a customer does not have to invest in network infrastructure. In recent years, the digital technology became mature. The radio's drop in price, the voice quality increases and the call set-up is always guaranteed. An Entropia subscription can be tailored to the average usage per month, the coverage and the necessary facilities. The subscription fee includes a generally flat-rate fee per month and per network connection (subscriber). This allows the user to be running for a longer period in advance and no surprises of exceeding budgets. It can be adapted to communicate with the public telephone network to priority calls and such. A remarkable service is the direct link to the internet via our data centers. Entropia offers through its partners a gateway between the digital trunked radio network and all conventional networks. Entropia has an excellent reputation for quality, durability and reliability and is following the ETSI standards. Entropia offers mission critical TETRA and via Combonet broadband 3GPP Communications.