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2. Tone remote - Wikipedia

   en.wikipedia.org/wiki/Tone_remote

   A Tone remote, also known as an EIA Tone remote, is a signaling system used to operate a two-way radio base station by some form of remote control. [1] [2] [3] A tone remote may be a stand-alone desktop device in a telephone housing with a speaker where the dial would have been located. It may look like a desk top base station.

3. Push-to-talk - Wikipedia

   en.wikipedia.org/wiki/Push-to-talk

   Push-to-talk (PTT), also known as press-to-transmit, is a method of having conversations or talking on half-duplex communication lines, including two-way radio, using a momentary button to switch from voice reception mode to transmit mode. CB radio with push-to-talk microphone switch

4. Wireless microphone - Wikipedia

   en.wikipedia.org/wiki/Wireless_microphone

   Wireless microphone receiver racks backstage at a large televised music awards event Wireless microphone and radio receiver. There are many types of receiver. True Diversity receivers have two radio modules and two antennas. Diversity receivers have one radio module and two antennas, although some times the second antenna may not be obviously ...

5. Short-range device - Wikipedia

   en.wikipedia.org/wiki/Short-range_device

   Applications for short-range wireless devices include power meters and other remote instrumentation, RFID applications, radio-controlled models, fire, security and social alarms, vehicle radars, wireless microphones and earphones, traffic signs and signals (including control signals), remote garage door openers and car keys, barcode readers ...

6. X10 (industry standard) - Wikipedia

   en.wikipedia.org/wiki/X10_(industry_standard)

   A wireless radio-based protocol transport is also defined. X10 was developed in 1975 by Pico Electronics of Glenrothes, Scotland , in order to allow remote control of home devices and appliances. It was the first general purpose home automation network technology and remains the most widely available [ citation needed ] .

7. MDC-1200 - Wikipedia

   en.wikipedia.org/wiki/MDC-1200

   MDC (Motorola Data Communications), also known as Stat-Alert, MDC-1200 and MDC-600, is a Motorola two-way radio low-speed data system using audio frequency shift keying, (AFSK).