In addition to mobile handsets, some services also work on a laptop, desktop, and tablet computers.
DUPAGE COUNTY SPRINT PUSH TO TALK RADIOS PUBLIC WORKS PORTABLE
Mobile push-to-talk services, offered by some mobile carriers directly as well as by independent companies, adds PTT functionality to smartphones and specialized mobile handsets (hand portable and mobile/base station PTT Radio Terminals). Manufacturers of ( POC or PoC) hardware include ToooAir and Hytera. This combines the operational advantages of PTT with the interference resistance and other virtues of mobile phones. Push-to-talk cellular calls similarly provide half-duplex communications - while one person transmits, the other(s) receive. A significant advantage of PTT is the ability for a single person to reach an active talk group with a single button press users don't need to make several telephone calls to coordinate with a group. A typical push-to-talk connection connects almost instantly. Push-to-talk over cellular ( PoC) is a service option for a cellular phone network that enables subscribers to use their phones as walkie-talkies with unlimited range. Some systems use PTT ID to identify the speaker.
In situations where a user may be too busy to handle a talk switch, voice operated switches are sometimes employed. This type of switch was historically called a pressel.
Less commonly, a separate hand-held PTT switch may be used. For heavy radio users, a PTT foot switch may be used, and also can be combined with either a boom-mounted microphone or a headset with integrated microphone. The PTT switch is most commonly located on the radio's handheld microphone, or for small hand-held radios, directly on the radio. Citizens Band is another example of classic push-to-talk operation. Similar considerations apply to police radio, the use of business band radios on construction sites, and other scenarios requiring coordination of several parties. Unlike in a conference call, they do not hear background noise from the ones who are not speaking. In doing so, they are aware of each other's actions and intentions. Those under the same frequency can hear others' transmissions while using procedure words such as "break", "break break" to separate order during the conversation (ICAO doc 9432). CB radio with push-to-talk microphone switch History įor example, an air traffic controller usually supervises several aircraft and talks on one radio frequency to all of them.
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