I have a Dell PowerEdge T310 server with a single serial port running Windows Server 2008 R2 Enterprise. I have a USRobotics 56k external modem connected to the serial port. The modem talks to a gate access control system. The gate access database is on the server.
I first verified in the Server's BIOS that the serial ports are enabled and that port 1 is assigned serial port 1 and port 2 is assigned to serial port 2 without console redirection. I used the control panel to access "Phones & Modems" and then added a "Standard 56k Modem" to COM1. I right clicked "properties" and then selected the "Diagnostics" tab. I then clicked "Query Modem" and got an error message saying
The modem failed to respond.
I went into "Device Manager" and verified that COM1 port is ok. I also verified that the baud rate, bits/byte, and parity were correctly set. The device manager said that COM1 was working correctly. I even tried to install the USRobotics drivers but they would not load because the driver load utility first goes out to see if server can talk to the modem. Of course the modem is powered on and the cable is connected to serial port 1 (there is only one serial port).
The USRobotics driver compatibility page says that the drivers are compatible with windows Server 2008 R2. Any ideas?