Radio over Internet Protocol, or RoIP, is similar to Voice over IP (VoIP), but augments two-way radio communications rather than telephone calls. From the system point of view, it is essentially VoIP with push-to-talk. To the user it can be implemented like any other radio network.
With RoIP, at least one node of a network is a radio connected via IP to other nodes in the radio network. The other nodes can be two-way radio.
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