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I have been building my own HMI's using Visual Basic and a DF1 ActiveX control to communicate to Allen-Bradley PLC's via direct link cable. I am looking into setting up a remote PLC with phone line access only. I know I need a modem on both ends but I need some help with setting up my Visual Basic application to dial the modem and then use my DF1 ActiveX driver to communicate through the modem to the remote modem. For now I am going to communicate with a Micrologix 1000.