The Radiotelephony
Radiotelephony or telephony in radio services is understood to mean the wireless transmission of spoken information using handheld radios, mobile radios or fixed stations. Radio communication takes place here. In most cases, radiotelephony is alternating traffic (half-duplex operation): Only one participant can speak while the others listen. A few technologies also allow full duplex operation, comparable to a telephone where you can hear and speak at the same time.