25 years of the TETRA standard and technology for contemporary digital trunking systems of professional mobile radio communications

Introduction/purpose: For the construction of functional mobile radio communication systems today, trunking digital communications are almost exclusively used, main representative which is system with application TETRA standards. This article describes beginnings and historical development this standard, activities ETSI MoU in fight for availability harmonization frequency spectrum. Methods: A description relevant issues origin 1 standard given as well analysis characteristic moments innovated 2 standard. Results: It also systematize use key world shows its share market by sectors, emphasizing dilemma further at crossroads after 25 years existence. Also, a basic overview while elements principle described. The improvements achieved way data transmission described more detail; process interoperability certification and, connection that, entry into North American emphasized. parameters selected advanced transfer according to 2-TEDS presented analyzed, together an some limitations during practical application. Conclusion: In conclusion, current moment analyzed focus on future development, emohasizing possibility modernizing improving network Ministry Interior Serbia needs MoD Serbian Armed Forces.