No dial tone. Check phone line connection. If modem is plugged into a phone line splitter, remove it and try connecting the line directly to a telephone wall jack. Cannot contact Internet provider with recommended AT command string. Check with your Internet provider for requirements.
Characters appear twice on screen.
Communication software not set up for full duplex operation. Incomprehensible characters appear on screen. Data bit, parity, and stop bit settings are incorrect. Windows 95 may have problems with the modem board even if the board was properly installed and the .INF file was properly loaded. If this does not work, then free an IRQ line by deleting or removing existing devices or boards and manually select the modem s IRQ from the Computer Properties screen.