Figure 9: Equipment Rack Types
Free-standing
enclosed rack
with perforated
sides and two
mounting posts
in the front
cFree-standing,
4-post open rack
with two
mounting posts
in the front, two
mounting posts
in the back or
along each side
bTelco-style racka
Telco 2-Post Rack
Item a in the above figure shows 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.
Cisco ASR 9901 Router
The Cisco ASR 9901 Router can be installed in 19-inch or 23-inch (with extension adapter plates) telco-style
racks. The chassis is supported by slide rails that are installed on the rear of the rack posts. Mounting brackets
are installed on the sides of the chassis and are inserted along the slide rails. The mounting brackets are then
secured to the front of the rack posts (see the following figure).
Preparing for Installation
12
Preparing for Installation
Telco 2-Post Rack
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