MTN South Africa has launched Push-to-talk (PTT) services on its network, running over GPRS via Nokia handsets. a company executive said, ‘The PTT technology has been through a successful pilot phase in South Africa and has enormous potential, as proven internationally.’ Unlike a normal GSM call where customers are charged for the duration of their call, with PTT they pay per PTT ‘push’. The conversation is secure within a closed group. The service required clarification from the regulator ICASA before launch as to its legality, as it is classified as voice-over-internet protocol (VoIP).
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