Lexmark C912 User's Reference - Page 85

Using printer menus Serial Menu Use the Serial Menu to change printer settings affecting jobs sent to the printer through a serial port (either Standard Serial or Serial Opt ). Note: Values marked with an asterisk (*) are the factory default settings. Menu Item Baud Data Bits Honor DSR Job Buffering Purpose Values To specify the rate at which data can be received through the serial port. 1200 2400 4800 9600* 19200 38400 57600 115200 138200 172800 230400 345600 To specify the number of data bits 7 that are sent in each transmission frame. 8* To determine whether the printer Off* uses the Data Set Ready (DSR) signal. DSR is one of the handshaking signals for most On serial interface cables. The serial interface uses DSR to distinguish data sent by the computer from data created by electrical noise in the serial cable. This electrical noise can cause stray characters to print. Select On to prevent stray characters from printing. To temporarily store jobs on the printer hard disk before printing. Note: Changing the Job Buffering menu item automatically resets the printer. Off* On Auto All data received by the serial port is treated as valid data. Only data received while the DSR signal is high is treated as valid. Does not buffer print jobs to the hard disk. Buffers print jobs to the hard disk. Buffers print jobs only if the printer is busy processing data from another input port. Serial Menu 80