MTX-Tunnel is a firmware that can be executed in our MTX modems to turn them into powerful GPRS-series or 3G-Series Gateways to give remote connectivity very simply to devices that only have an RS232 or RS485 serial port (such as counters, probes Temperature or level …), to become a complete fleet control device or even to send to the cloud sensor monitoring (Modbus registers, temperatures, digital signals, analog signals, pulse counters …).