Earners of this badge will be able to describe the benefits the TETRA technology can deliver, and the TETRA market and associated eco-system. They will have also gained an appreciation of the requirements of PMR (Professional Mobile Radio) user organisations and the complexity of specifying and designing such systems. In addition, they will understand the function of all the TETRA Interfaces described in the ETSI standards and why an Interoperability Test and Certification process is required.