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Requirements Specific to Perforated Cabinets
• Standard 19-in. (48.3 cm) (four-post EIA cabinet or rack, with mounting rails that conform to English
The cabinet or rack must also meet the following requirements:
• The minimum vertical rack space for the Cisco NCS 5000 router chassis must be one RU (rack units).
• The width between the rack-mounting rails must be at least 19 inches if the rear of the router is not
• For four-post EIA cabinets (perforated or solid-walled), the requirements are as follows:
Requirements Specific to Perforated Cabinets
A perforated cabinet is as a cabinet with perforated front and rear doors and solid side walls. In addition to
the requirements listed in the
must meet the following requirements:
• The front and rear doors must have at least a 60 percent open area perforation pattern, with at least 15
• The roof should be perforated with at least a 20 percent open area.
• The cabinet floor should be open or perforated to enhance cooling.
Cisco provides an R-Series rack that conforms to these requirements.
Cable Management Guidelines
To help with cable management, you might want to allow additional space in the rack above and below the
chassis to make it easier to route as many as 56 fiber or copper cables through the rack.
Hardware Installation Guide for Cisco NCS 5000 Series Routers
46
universal hole spacing per section 1 of ANSI/EIA-310-D-1992. See the
Perforated Cabinets, on page
attached to the rack. For four-post EIA racks, this is the distance between the two front rails.
• The minimum spacing for the bend radius for fiber-optic cables should have the front-mounting
rails of the cabinet offset from the front door by a minimum of 3 inches (7.6 cm), and a minimum
of 5 inches (12.7 cm) if cable management brackets are installed on the front of the chassis.
• The distance between the outside face of the front mounting rail and the outside face of the back
mounting rail should be 23.5 to 34.0 inches (59.7 to 86.4 cm) to allow for rear-bracket installation.
• A minimum of 2.5 inches (6.4 cm) of clear space should exist between the side edge of the chassis
and the side wall of the cabinet. No sizeable flow obstructions should be immediately in the way
of chassis air intake or exhaust vents.
Optional jumper power cords are available for use in a cabinet. See the Jumper Power
Note
Cord section on page C-8
"General Requirements for Cabins and Racks, on page
square inches (96.8 square cm) of open area per rack unit of door height.
46".
Cabinet and Rack Installation
"Requirements Specific to
45" , perforated cabinets
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