(= terrestrial trunked radio,
"maapealne mobiilside magistraalvõrk")

olemus
mobiilraadioside taristu avatud standard (ETSI, alates 1995), mis on suunatud eeskätt operatiivteenistustele (politsei, päästeamet, tehnoteenusefirmad jt); rakendatakse lisaks Euroopale ka paljudes arengumaades
= a European standard for a trunked radio system

ülevaateid
https://en.wikipedia.org/wiki/Terrestrial_Trunked_Radio
http://www.ok1mjo.com/all/tetra/vseobecne_informace/TETRA_Selex_Introduction_to_TETRA_TErrestrial-Trunked-RAdio.pdf
https://cdn.rohde-schwarz.com/pws/dl_downloads/dl_common_library/dl_brochures_and_datasheets/pdf_1/Tetra_e.pdf

standardid
https://www.etsi.org/deliver/etsi_en/300300_300399/30039202/02.01.01_60/en_30039202v020101p.pdf
https://www.etsi.org/deliver/etsi_en/300300_300399/30039604/01.02.01_60/en_30039604v010201p.pdf
https://www.etsi.org/deliver/etsi_ts/101000_101099/101040/01.01.01_60/ts_101040v010101p.pdf

turvalisus
http://www.jcomputers.us/vol13/jcp1303-04.pdf

https://tcca.info/documents/2018-may_sfpg_security_considerations_for_interconnection.pdf/