Push-to-talk over cellular (PTToC or PoC) is a technology that enables voice communication via the mobile phone network at the touch of a button, in a similar way to traditional radio devices. Users can communicate with individuals or groups via a PTT-enabled mobile device (e.g. a smartphone).

Combining the convenience of modern mobile devices with the speed of radio communication, PTToC is often used in security- or logistics-related applications.

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