In that world, consumers would be able to communicate through the air, and through cable lines in their homes, without subscribing to services from the old phone company.įor Forsee, that marks a shift in worldview. This would include Internet-based phone service, high-speed Internet connections, and television, music and entertainment viewable on a cellular phone. Forsee, means Sprint, along with cable companies, would market a megabundle of entertainment and communications services. The new strategy, as outlined by chief executive Gary D. It's also about to move its corporate headquarters to Reston, and partner with cable companies to offer alternate technologies to replace the traditional phone. Now, Sprint is about to redefine and reinvent what it means to be a telephone company by cutting itself free of the phone-line business, and focusing on its prospering wireless division. It started selling long-distance service in the mid-1980s, and built a fiber-optic network and a majestic brick campus at its headquarters that is a source of civic pride and commercial power in the Kansas City area. in Abilene, Kan., more than a century ago, a manual switchboard operation that linked homes to Western Union or the town hall. Over-the-top (OTT) applications are not dependent on a specific carrier and nearly as fast as carrier implementations.Sprint Corp. Wireless carrier-grade PTT systems have adapted to and adopted the smartphone platform by providing downloadable apps that support their PTT systems across many mobile platforms. Recent development in PTT communications is the appearance of apps on smartphones, some of which can function on multiple platforms. In addition to mobile handsets, some services also work on a laptop, desktop, and tablet computers. 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 US Inc. 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 ( PTToC) 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). 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.ĬB 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. JSTOR ( February 2013) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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