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Push To Talk Devices | Software & Android & iPhone Apps | Peal PTT
7 Reasons Two-Way Radio Push to Talk (PTT) is better than Cellular | EMCI Wireless
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Understanding Push-to-talk over Cellular: Key benefits and use cases | Tramigo
It's no accident that Apple chose a yellow icon for its walkie-talkie feature. I dug out my old (2002ish) Nextel with PTT (push to talk). It was all the rage back then... :
Push to Talk (PTT) Plus Services | Verizon
What is Push to-Talk over Cellular, and How Does It Work?
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Motorola launches three new push-to-talk (PTT) enabled mobile phones
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How does PTT (push to talk) work for cellphones? - Quora
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