Lexmark 248X ユーザーズマニュアル

Section 6: Using the Printer Interface

Because all data transmissions require CTS, it must be detected prior to 
the XON/XOFF protocol initiating. Once CTS is detected, after POR, the 
printer transmits an XON command. It is not necessary for the host to 
detect this initial XON command prior to transmitting data to the 
printer.

The printer transmits an XOFF command to the host when the receive 
buffer is full.

The printer transmits an XON command to the host when buffer space 
becomes available and the printer is ready to receive more data.

For the correct operation of the serial adapter, you must configure the operating 
system of the computer. The following examples show how to configure DOS 
and OS/2 for the printer using serial DTR protocol.

From the DOS prompt, enter the following commands:

mode com1:9600,n,8,1

Include this command statement in the AUTOEXEC.BAT file on the computer 
so it runs each time your system starts operating.

From Desktop Manager or Group Utilities, select Utilities.

Select Control Panel.

Select Options.

Select Communications Port. 

For the port you wish to set up, set the following parameters to match 
the printer defaults.

Baud rate = 9600
Word length = 8
Parity = none
Stop bits =1
Handshake = hardware

Select Set.

Make sure the OS/2 serial port settings match the switch settings on the serial 
adapter. To view or to change the settings: