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Zello is a tech software company in Austin, Texas, U.S., known for the Zello app, which emulates push-to-talk (PTT) walkie-talkies over cell phone networks. History [ edit ]
A walkie-talkie, more formally known as a handheld transceiver, HT, or handheld radio, is a hand-held, portable, two-way radio transceiver.Its development during the Second World War has been variously credited to Donald Hings, radio engineer Alfred J. Gross, Henryk Magnuski and engineering teams at Motorola.
So your boss always knew if you were avoiding the calls. and probably why US business circumvented the the requirement for hands free talking while driving for decades because it these devices could considered a “walkie talkie” rather than a “phone” 31.53.18.214 21:15, 25 October 2022 (UTC)
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 ...
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).
In the absence of a network, mobiles/portables can use 'direct mode' whereby they share channels directly (walkie-talkie mode). Gateway mode - where a single mobile with connection to the network can act as a relay for other nearby mobiles that are out of range of the infrastructure.
In the days when CB required a license, some low-powered or toy walkie-talkies were exempt because they operated within Part 15. However, in 1976, the FCC phased in a shift of these 100 mW [ 12 ] devices to the 49 MHz band, with operation on the CB frequencies to cease in 1983. [ 13 ]
Al Gross – father of Walkie Talkies — Short article on Al Gross from a PMR446 website. Interview with Al Gross from 1999 [dead link ] About.com article on walkie-talkie; Al Gross recorded interviews and extensive biography; Al Gross Obituary — Audio interview; Hamgallery.com tribute; Al Gross — Prominent Member of EMC Society