IBM 1220 - Manual (Page 164)

162
Data Bits
Purpose:
To specify the number of data bits that are sent in each transmission frame.
Values:
Honor DSR
Purpose:
To determine whether the printer uses the Data Set Ready (DSR) signal. DSR is one of the
handshaking signals for most serial interface cables.
Values:
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.
Job Buffering
Purpose:
To temporarily store jobs on the printer hard disk before printing.
Values:
Note: Changing the Job Buffering menu item automatically resets the printer.
7
8*
Off* All data received by the serial port is treated as valid data.
On Only data received while the DSR signal is high is treated as valid.
Off* Does not buffer print jobs to the hard disk.
On Buffers print jobs to the hard disk.
Auto Buffers print jobs only if the printer is busy processing data from another input port.