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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, which only receives transmissions. Two-way radios usually use a half-duplex communication channel ...
A video door-phone (also known as a video door entry or video intercom) is a stand-alone intercom system used to manage calls made at the entrance to a building ( residential complex, detached family home, workplace, etc.) with access controlled by audiovisual communication between the inside and outside. The main feature of video door entry is ...
Two-way communication involves feedback from the receiver to the sender. This allows the sender to know the message was received accurately by the receiver. One person is the sender, which means they send a message to another person via face to face, email, telephone, etc. The other person is the receiver, which means they are the one getting ...
Raycom Media, Inc. was an American television broadcasting company based in Montgomery, Alabama. Raycom owned and/or provided services for 65 television stations and two radio stations across 44 markets in 20 states. Raycom, through its Community Newspaper Holdings subsidiary, also owned multiple newspapers in small and medium-sized markets ...
An intercom, also called an intercommunication device, intercommunicator, or interphone, is a stand-alone voice communications system for use within a building, small collection of buildings or portably within a small coverage area, which functions independently of the public telephone network. [ 1] Intercoms are generally mounted permanently ...
Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.
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 ...
Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [ 1] – defined as "A transmitter-receiver associated with a fixed navigational mark which, when triggered by a radar, automatically returns a distinctive signal which can appear on the display of the ...
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