PTT - Push to Talk

PTT is a walkie-talkie style service that uses the services of cellular network technology such as GSM (Global System for Mobile communications), GPRS (General Packet Radio Service) and 3G (Third Generation) systems such as UMTS (Universal Mobile telecommunications System) and CDMA2000 It was first offered as a service over ten years ago by Nextel, a North American carrier.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

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