Lexmark Optra T Installationsanweisungen Seite 4

Introduction
The Lexmark Optra™ T High-Capacity Output Stacker gives your printer
additional output capacity by allowing you to print and stack up to
approximately 1,500 sheets of 20 lb paper.
To ensure reliable paper feeding, it is important that you select paper
recommended for use with the printer and that you load it properly.
Refer to the Reference section of your printer User's Guide for information
pertaining to safety and warranty.
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High-Capacity Output Stacker Installation Instructions