Cisco Systems ASR 9001 manual Rack-Mounting and Air Flow Clearance Guidelines, Telco 2-Post Rack

Chapter 1 Preparing for Installation

Site Requirement Guidelines

Rack-Mounting and Air Flow Clearance Guidelines

The router can be mounted in most 2-post, 4-post, or telco-style 19-inch equipment racks that comply with the Electronics Industries Association (EIA) standard for equipment racks (EIA-310-D). The rack must have at least two posts with mounting flanges to mount the router chassis. The distance between the center lines of the mounting holes on the two mounting posts must be 18.31 inches ± 0.06 inch (46.50 cm ± 0.15 cm).

Figure 1-6shows examples of typical 2-post, 4-post, and telco-type equipment racks.

Figure 1-6 Equipment Rack Types

a b

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c

a	Telco-style rack	b	Free-standing, 4-post open	c	Free-standing enclosed rack
			rack with two mounting		with perforated sides and
			posts in the front, two		two mounting posts in the
			mounting posts in the back		front
			or along each side

Telco 2-Post Rack

Item a in Figure 1-6shows a telco-style rack. The telco-style rack is an open frame consisting of two posts tied together by a cross-bar at the top and a floor-stand at the bottom.

This type of rack is usually secured to the floor, and sometimes to an overhead structure or wall for additional stability. The router chassis can be installed in the telco-style rack only in a front-mounted position.

In the front-mounted position, you secure the chassis rack-mounting brackets directly to the rack posts (see Figure 1-7as an example of a Cisco ASR 9001 Router rack mounting). Two rear mounting brackets are provided for mounting the Cisco ASR 9001 Router in a 2-post rack.

Cisco ASR 9001 and Cisco ASR 9001-S Routers Hardware Installation Guide

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