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push-to-talk

Push-to-talk (or press-to-talk) is a two-way communication method that uses half-duplex mode where transmission occurs in both directions, but not at the same time. To use PTT, users must press a button on the PTT device while speaking, then release it when done. The listener must then do the same to respond. Common PTT devices include the walkie-talkie. Newer PTT systems use VoIP to provide digital PTT service over 3G data networks. Synonymous with press-to-talk.

In PC and mobile voice chat applications, push-to-talk is a software feature that requires the speaker to press a button to enable voice speaking. This prevents background noises and talking from sending during the chat session.

Push-to-talk may be abbreviated as PTT or P2T.
See also Push-to-talk Over Cellular.










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