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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.

3. 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 ...

4. Astro (Motorola) - Wikipedia

   en.wikipedia.org/wiki/Astro_(Motorola)

   The ASTRO 25 core is the hub for the communications network. It comprises P25 portable and mobile radios, dispatch consoles, data applications, and RF conventional or trunked sites. [16] In addition to ASTRO 25, Motorola also builds several other P25 radio models, including the APX family of radios, designed for first responders. [17]

5. Coverage (telecommunication) - Wikipedia

   en.wikipedia.org/wiki/Coverage_(telecommunication)

   Broadcasters and telecommunications companies frequently produce coverage maps to indicate to users the station's intended service area. Coverage depends on several factors, such as orography (i.e. mountains) and buildings, technology, radio frequency and perhaps most importantly for two-way telecommunications the sensitivity and transmit ...

6. Non-line-of-sight propagation - Wikipedia

   en.wikipedia.org/wiki/Non-line-of-sight_propagation

   Low-frequency radio waves travel easily through brick and stone and VLF even penetrates sea-water. As the frequency rises, absorption effects become more important. At microwave or higher frequencies, absorption by molecular resonances in the atmosphere (mostly from water, H 2 O and oxygen, O 2) is a major factor in radio propagation. For ...

7. These are the top 100 Black Friday deals, according to Walmart

   www.aol.com/lifestyle/these-are-the-top-100...

   PlayStation VR 2 - Horizon Call of the Mountain Bundle for $349 (save $250.99) PlayStation 5 Digital Edition with Fortnite for $374 (save $75.99) ... Shark IQ 2-in-1-Robot Vacuum and Mop for $148 ...

8. What are the BRIC nations? Why did Donald Trump ... - AOL

   www.aol.com/bric-nations-why-did-donald...

   Donald Trump continues to threaten tariffs against foreign nations, this time toward a bloc of nine countries if they try to undermine the dollar's global dominance.

9. EF Johnson Technologies - Wikipedia

   en.wikipedia.org/wiki/EF_Johnson_Technologies

   EF Johnson Technologies, Inc. is a two-way radio manufacturer founded by its namesake, Edgar Frederick Johnson, in Waseca, Minnesota, United States in 1923. [1] Today it is a wholly owned subsidiary of JVCKenwood of Yokohama, Japan. EF Johnson Technologies offers a wide range of equipment for use by law enforcement, firefighters, EMS, and military.