Configuring Systems for Terminals, Printers, and Other Serial Devices (32022-90057)

Describing Asynchronous Devices
How to Use Duplex Printing
Chapter 9
169
How to Use Duplex Printing
Duplex printing is the ability to print on both the front and back sides of the printer
paper. The Laserjet 3D and the Laserjet 3SI are the two PCL (Printer Control Language)
laser printers that support duplex printing. These two printers also support simplex
(one-sided) printing.
To use duplex printing on these printers, duplex printing must be configured and
enabled. Configuration consists of modifying an existing printer type file so that Duplex
Printer Mode is enabled. This is done using the Workstation Configurator
(TTUTIL.PUB.SYS). This printer type file is then assigned to the printer in NMMGR.
This allows the Terminal I/O driver to send the Front-of-Page (FOP) escape sequence to
the printer when appropriate.
In the Workstation Configurator, the field before the question Does the printer
support duplex printing (Y, N), type Y to indicate that a printer may be used as a
duplex printer. To save this modification, press
[ENTER]
and then the SAVE DATA function
key.
Once configuration is complete the printer must be enabled for duplex printing. Duplex
printing can be enabled and disabled by sending escape sequences to the printer. This
can be done in three ways:
• Escape sequences can be embedded in the data file being printed.
• The printer type file can be modified to include the escape sequence as part of the
initialization string.
• The printer type file can be modified to include the escape sequence as a Vertical
Forms Control (VFC) string.
There are three escape sequences for duplex printing:
[ESC]&l1S - Enable vertical binding duplex mode
[ESC]&l2S - Enable horizontal binding duplex mode
[ESC]&10S - Disable duplex mode (enable simplex mode)