page_title: Radiotelephone
hierarchical_section_title: Radiotelephone
caption_attribution_description: Deutsch: Handys verschiedener Generationen: Amateurfunkhandy von 1981 (links), Telefonhandy von 2001 Links ein Amateurfunk-Handsprechfunkgerät, Icom IC2e (ca. 1981, FM, Wellenlänge 2 m). Mitte ein Telefonnetzhandy Siemens S45i (ca. 2001, GSM, Wellenlänge ca. 35 cm und 15 cm). Rechts eine Streichholzschachtel zum Größenvergleich.
context_page_description: A radiotelephone is a radio communication system for transmission of speech over radio. Radiotelephony means transmission of sound by radio, in contrast to radiotelegraphy, which is transmission of telegraph signals, or television, transmission of moving pictures and sound. The term may include radio broadcasting systems, which transmit audio one way to listeners, but usually refers to two-way radio systems for bidirectional person-to-person voice communication between separated users, such as CB radio or marine radio. In spite of the name, radiotelephony systems are not necessarily connected to or have anything to do with the telephone network, and in some radio services, including GMRS, interconnection is prohibited.
context_section_description: A radiotelephone (or radiophone) is a radio communication system for transmission of speech over radio.  Radiotelephony means transmission of sound (audio) by radio, in contrast to radiotelegraphy, which is transmission of telegraph signals, or television, transmission of moving pictures and sound.  The term may include radio broadcasting systems, which transmit audio one way to listeners,  but usually refers to two-way radio systems for bidirectional person-to-person voice communication between separated users, such as CB radio or marine radio.  In spite of the name, radiotelephony systems are not necessarily connected to or have anything to do with the telephone network, and in some radio services, including GMRS, interconnection is prohibited.
caption: Comparison of an amateur radio handheld transceiver, cell phone, and matchbox
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