Samsung Electronics has developed a working PTA (Push-to-All) solution based on CDMA EV-DO. The demonstration of the PTA solution prototype took place at the company's Telecommunications R&D Center in Suwon, Korea.

This total mobile communications solution incorporates the existing PTT (Push-to-Talk) one to multi-user voice technology with the one to multi-user video conferencing ability of PTV (Push-to-View) and multimedia file sharing function of PTD (Push-to Data).

The main benefit of PTA handsets is their synchronous video conferencing ability. Similar to a walkie-talkie with video capabilities, the speaker's image appears instantly on the handset screen of the user or multiple users on the call. The functionality allows people in multiple locations to easily conduct virtual meetings. In addition, the PTA handset allows one to send image, video clip and music contents to multiple users through one operation on a mobile device at one time.

Samsung Electronics plans to offer a commercialized PTA solution handset using not only EV-DO technology but also EDGE, UMTS, and WiFi standards later on.