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2. Two-way radio - Wikipedia

   en.wikipedia.org/wiki/Two-way_radio

   Naval air traffic controller communicates with aircraft over a two-way radio headset A variety of portable handheld two-way radios for private use. A two-way radio is a radio transceiver (a radio that can both transmit and receive radio waves), which is used for bidirectional person-to-person voice communication with other users with similar radios, [1] in contrast to a broadcast receiver ...

3. Intercom - Wikipedia

   en.wikipedia.org/wiki/Intercom

   Intercom mounting systems can be attached to most motorcycle helmets. [2] Several different types of technologies can be used, including various types of citizens band radio like for example PMR446 , Bluetooth , or dynamic mesh communication (DMC) which is a mesh based intercom system developed for motorcycle communication.

4. Two-way communication - Wikipedia

   en.wikipedia.org/wiki/Two-way_communication

   Two-way communication is a form of transmission in which both parties involved transmit information. Two-way communication has also been referred to as interpersonal communication. Common forms of two-way communication are: Amateur radio, CB or FRS radio contacts. Chatrooms and instant messaging. Computer networks. See backchannel. In-person ...

5. Duplex (telecommunications) - Wikipedia

   en.wikipedia.org/wiki/Duplex_(telecommunications)

   A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions. Duplex systems are employed in many communications networks, either to allow for simultaneous communication in both directions between two connected parties or to provide a reverse path for the monitoring and remote adjustment ...

6. Kenwood Corporation - Wikipedia

   en.wikipedia.org/wiki/Kenwood_Corporation

   Kenwood introduced its Sovereign line of components in 2001. In 2007, Kenwood discontinued its line of consumer audio receivers, home theatre systems and other home electronics. Today, Kenwood products include home audio, car audio aftermarket and OEM, in-car entertainment, amateur radio, professional two-way radio and DECT wireless intercom ...

7. Trunked radio system - Wikipedia

   en.wikipedia.org/wiki/Trunked_radio_system

   A trunked radio system is a two-way radio system that uses a control channel to automatically assign frequency channels to groups of user radios. In a traditional half-duplex land mobile radio system a group of users (a talkgroup) with mobile and portable two-way radios communicate over a single shared radio channel, with one user at a time ...