- Hewlett-Packard LaserJet Printer Getting Started Guide

22 Getting Started Guide
EN
Accessory Connector
The accessory connector is used for adding optional paper handling
(external input, output, and paper finishing) devices provided by HP-
authorized hardware developers. For specific installation
instructions, see the documentation provided with these products.
Caution
Make sure printer is turned off before connecting a device to the
accessory connector.
Caution
Do not connect the accessory cable to the serial port.