Abstract: A circuit for connecting radio frequency transceivers and cellular radio systems to a computer for improving the efficiency and distance of two-way radio communications devices. A device for connecting radio frequency transceivers and cellular radio systems to a computer for improving the efficiency and distance of two-way radio communications devices. A method for connecting radio frequency transceivers and cellular radio systems to a computer for improving the efficiency and distance of two-way radio communications devices.

Abstract: A system, method and program for enabling a mobile terminal to communicate with a transceiver via two-way radio over a communication network. The mobile terminal receives a first radio communication, converts the first radio communication into first data packets, masks a destination port of the first data packets to appear as a data transfer port of the mobile terminal configured to exchange data with a server, and transmits the first data packets having the masked destination port to the server via the communication network. The mobile terminal receives second data packets, which are converted from a second radio communication transmitted from the transceiver and have a destination port masked to appear as a data receiving port of the mobile terminal configured to exchange data with the server, from the server via the communication network, converts the second data packets to the second radio communication, and outputs the second radio communication.