Cisco XR 12416 - Manual (Page 9)

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Cisco XR 12416 and Cisco XR 12816 Router Chassis Installation Guide
OL-17440-01
Chapter 2 Preparing for Installation
Site Requirement Guidelines
Telco Rack
Figure 2-2 c shows a telco-type rack. The telco-type 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-type rack either in a front-mounted position or a center-mounted position
(
Figure 2-3 ).
• In the front-mounted position, you secure the chassis rack-mounting brackets
directly to the rack posts.
• In the center-mounted position, you secure a set of optional center-mount
brackets to the rack posts. The chassis rack-mounting flanges are then
secured to the center-mount brackets. The center-mounted position moves the
center of gravity of the chassis closer to the vertical axis of the rack posts,
which adds to the stability of the rack installation.