Juniper Networks M7i quick start The rack or cabinet must have an adequate supply of cooling air

M7i Internet Router Quick Start

floor-to-ceiling rack. If you do so, the rack must be capable of supporting a combined weight of over 766 lb (347 kg).

■The rack rails must be spaced widely enough to accommodate the router chassis's external dimensions: 3.5 in. (8.9 cm) high, 18.2 in. (45.7 cm) deep, and 17.5 in. (44.5 cm) wide. The mounting hardware extends the width to fit into standard 19-in. racks.

■For service personnel to remove and install hardware components, there must be adequate space at the front and back of the router. At least 24 in. (61.0 cm) both in front of and behind the rack or cabinet is required. NEBS GR-63 recommends at least 30 in. in front of the rack or cabinet.

■The rack or cabinet must have an adequate supply of cooling air:

■6 in. (15.2 cm) is required between the side of the router and any equipment that produces heat.

■2.8 in. (7.1 cm) is required between the side of the router and any large surface that does not produce heat, such as a wall.

■In a closed cabinet, there must be a minimum of 6 in. (15.2 cm) of unobstructed airflow behind the router, or airflow baffles must be installed to prevent recirculation of hot air and overheating.

■If the router is the only unit in the rack, mount it at the bottom of the rack.

■When mounting the router in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack.

4■ Step 1: Prepare the Site