each 12.5 kHz channel. See also APCO-16, an earlier standard that specified trunking formats and radio operation Digital Audio Broadcasting Digital terrestrial television Government radio networks in Australia, examples deployment of P25 technology NXDN, a two-way digital radio standard with similar characteristics (Optional TDMA) Terrestrial Trunked Radio, TETRA, the European(EU) standard equivalent to P25 Notes External links P25 Overview TIA Standards Development Activities for Public Safety https://web.archive.org/web/20110223005820/http://www.apco911.org/frequency/project25.php APCO International Project 25 page http://www.apco.ca/ APCO Canada http://www.dvsinc.com/papers/p25_training_guide.pdf Daniels' P25 Radio System Training Guide https://valid8.com/solutions/p25-issi-cssi-conformance P25 Compliance Test Tools for ISSI & CSSI https://web.archive.org/web/20170611161725/http://www.dvsinc.com/prj25.htm DVSI P25 Vocoder Software and Hardware http://www.p25phase2.com Radio users and experts discuss P25 Phase 2 Trunked radio systems Telecommunications standards Computer security exploits