OnCell G3100 Series Introducing OnCell Central Manager and Ethernet Operation Modes
Virtual Modem Mode
Note: This function is only supported by the OnCell G3100 HW Rev. 2.0 and Rev. 3.0. Please refer to
the Specifications section of Chapter 1 (page 1-3) for more information.
Virtual Modem mode is designed for AT command operating system devices. Its purpose is to extend the
limited RS-232 cabling distance between computers and modems (Figure 1). The setup in Figure 2 is not an
efficient architecture because we need to deploy extra devices to bridge the gap. A more efficient solution is
provided in Figure 3. By taking advantage of the cable length of Ethernet cables, connecting a properly
configured OnCell IP gateway’s Ethernet port to the device computer’s Ethernet port and installing the Moxa
driver, users can transmit data over a cellular network with software originally designed to transmit data
through a modem. Please refer to Chapter 10, Configuring Virtual Modem Mode.
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