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I need to communicate with a SIEMENS PLC, the model is: SIMATIC S5 100U with a 103 CPU, the communications has to be done using dial-up to call to the PLC's modem. The modem is installed in the PLC, and the model is: SIEMENS SINAUT MD125. I have no information about that modem, so I'm looking for anyone who knows how to do this or someone with information about the modem. Thanks. Santiago Carvallo V. [email protected]