How to configure a modem in MS-DOS
Updated: 01/24/2018 by Computer Hope
With older computers and programs that the modem may need to be configured manually. The below chart lists all the settings that the DB9 serial port.
| Serial parameters | Choices | Serial parameters | Choices |
|---|---|---|---|
| Baud Rate | 300 600 1200 2400 4800 9600 19.2K 38.4K |
Parity | Even Odd Mark Space None |
| Data Bits | 7 8 |
Flow Control | XON/XOFF DTR/DSR |
| Stop Bits | 1 2 |
By default, your computer would use:
Baud Rate: 9600, Data Bits: 8, Stop Bits: 1, Parity: None, Flow Control: XON/XOFF.
To set values from an MS-DOS prompt, use the mode command. We listed a few examples to give you a general idea how to use this command.
MODE COM1:9600,N,8,1,P - This command would set Communications port COM1 to 9600 Baud, with no parity, 8 data bits, 1 stop bit, and with XON/XOFF (these are the default settings).
Note
If you are using Windows 95, Windows 98, Windows Me, Windows NT, Windows 2000, Windows XP, or a newer version of Windows, do not configure your COM port manually. Instead, configure it using the Windows Device Manager.