Terrestrial trunked radio (TETRA) is an open standard pertaining to the European Telecommunications Standards Institute (ETSI) (France). The main purpose of the TETRA standard is to describe a set of open interfaces and services for developing infrastructure and terminal products that would fully interoperate with each other and meet the needs of traditional professional mobile radios (PMRs). A terrestrial trunked radio is a professional mobile radio with two-way transceiver specification. TETRA is mainly designed for use in government agencies, emergency services, public safety networks, transport services, and the military sector. -------------------------------- 1. Micromarkets are defined as the further segments and subsegments of the overall terrestrial trunked radio market included in the report. 2. Core competencies of the companies are captured in terms of their key developments and key strategies adopted by them to sustain their position in the terrestrial trunked radio market.