Configuring a modem in MS-DOS.
Issue
Configuring a modem in MS-DOS.
Cause
It may be required for older computers and programs that the modem be setup through MS-DOS.
Solution
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 a MS-DOS Prompt you can use the Mode Command; we have listed a few examples to give you a general idea how to use this command.
MODE COM1:9600,N,8,1,P - The below command would set Communications port COM1 to 9600 Baud, with no parity, 8 databits, 1 Stop Bit, and with XON/XOFF (These are the default settings). For those who are using Windows 95, Windows 98, Windows ME, Windows NT, Windows 2000, or Windows XP it is recommend not to configure your communication port this way and instead configure it the appropriate way depending upon the operating system.