Hello We are looking for a way to connect two AB plc's together to pass data. Each is at a different site. To far to wire or radio modem. Considering serial dail up modem, DSL, or anything else that might work. Ex. PLC 1 would be programmed to call PLC 2 every 10 minutes. PLC 1 would collect date N7 stuff and set a few bits and hang up AB's modem is call a Dial IN modem, AB site seems to have no ideas thanks for any suggestions Mark30504@yahoo.com