I have 4 (four) outstations with traffic dataloggers on them. All have an RS-232 communications port. An ethernet switch will be installed in the same cabinets as each of the dataloggers. In a control center, there is a PC running software for telemetry, that can talk only to the two comms ports on the PC. It is meant to work with modems. There is also an ethernet switch in the control center. If I put an RS-232 to IP converter near each datalogger (any recommendations?), giving an IP address to that equipment, what can I put in the control center? Is there any kind of "IP modem", either by software or hardware?