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• Radiotelephone - Wikipedia
  Radiotelephony refers specifically to two-way radio systems for bidirectional person-to-person voice communication between separated users, such as CB radio or ...
  https://en.wikipedia.org/wiki/Radiotelephone
• Description for 4812: Radiotelephone Communications - OSHA
  Establishments primarily engaged in providing two-way radiotelephone communications services, such as cellular telephone services. This industry also includes ...
  http://www.osha.gov/sic-manual/4812
• Radio Communications Phraseology and Techniques - FAA
  Section 2. Radio Communications Phraseology and Techniques · Listen before you transmit. · Think before keying your transmitter. · The microphone should be very ...
  https://www.faa.gov/air_traffic/publications/atpubs/aim_html/chap4_section_2.html
• Rural Radiotelephone Service | Federal Communications Commission
  Rural Radiotelephone spectrum is used to provide basic, analog, telephone service to subscribers in locations deemed so remote that traditional ...
  https://www.fcc.gov/wireless/bureau-divisions/mobility-division/rural-radiotelephone-service