Then, try entering ATE1 on the blank Communications screen. However, the modem must be told not to change its connection speed with your computer upon connection with the IUB modem pool. The sequence for this varies from modem to modem. The first step is to find out what COM ports already exist. One way to find out what's in your computer is to pay close attention to the computer screen as you start it up.
Many computers display a hardware information screen soon after booting.
Otherwise, you can use Microsoft System Diagnostics , a program provided with DOS 6.0 and higher and Windows 3.1 through 3.11. Once the MSD menu comes up on the screen, press c for COM ports. This is important, because a modem is a serial port, and must be configured not to be the same as any existing COM port. In this example, there are two COM ports, COM1 and COM2. Windows has a bug that makes skipping a COM port problematic, so it is best to use COM3 in this case.