Corporate Headquarters: Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USACopyright © 2000. Cisco Systems, Inc. All rights reserved. 78-11336-01Center-Mount Bracket Installation Guide forCisco 3640 RoutersThis document provides instructions for use of center-mount brackets for rack mounting of Cisco 3640routers.The center-mount bracket provides enhanced solidarity for router chassis mounted in standard 23-inchtelco racks. This mounting system assures earthquake safety for rack-mounted routers.The center-mount bracket kit contains one pair of brackets and 12 screws for attaching the brackets tothe router chassis. The two brackets are identical, and each bracket can be mounted on either side of therouter chassis.Use this document in conjunction with the following documents:• Cisco 3600 Series Routers Hardware Installation Guide, DOC-785921=• Cisco 3600 Series Routers Regulatory Compliance and Safety Information, 78-3020-xxIf you have questions or need help, see the “Obtaining Technical Assistance” section on page 9.This document contains the following sections:• Safety Recommendations, page 2• Required Tools and Equipment, page 5• Attaching the Center-Mount Brackets to the Chassis, page 5• Installing the Chassis in a 23-Inch Telco Rack, page 7• Obtaining Documentation, page 8• Obtaining Technical Assistance, page 9