Cisco Systems 2821 Series, 2851 Series manual

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Installing and Upgrading Fans in the Cisco 2821 and Cisco 2851 Series Routers

This document describes how to install or upgrade fans inside your Cisco2821 and Cisco 2851 series

routers.

This document is intended for the fan installer who is familiar with electronic circuitry and wiring

practices and has experience as an electronic or electromechanical technician.

Note Use this document in conjunction with the following documents:

•Cisco 2800 Series Hardware Installation guide:

http://www.cisco.com/en/US/docs/routers/access/2800/hardware/installation/guide/hw.html

•Cisco 2800 Series and Cisco 3800 Series Integrated Services Routers Regulatory Compliance and

Safety Information document:

http://www.cisco.com/en/US/docs/routers/access/2800/hardware/rcsi/2838rcsi.html

If you have questions or need help, see the “Obtaining Documentation, Obtaining Support, and Security

Guidelines” section on page 20.

This document contains the following sections:

•Safety Warnings and Guidelines, page2

•Items in the Fan Replacement Kit, page10

•Required Tools and Equipment, page10

•Location of the Cisco 2821 and Cisco 2851 Router Fans, page11

•Upgrading the Cisco 2821 and Cisco 2851 Fan Unit, page11

•Obtaining Documentation, Obtaining Support, and Security Guidelines, page20.