Step 1: Preparing The Site; Rack-Mounting Requirements - Juniper T640 Quick Start Manual

T640 Core Router Quick Start

Step 1: Preparing the Site

Rack-Mounting Requirements

4
Before installing the router, make sure that the site meets all the power, environmental,
and clearance requirements. See the site preparation guidelines in the T640 Core Router
Hardware Guide.
Rack-Mounting Requirements on page 4
Tools Required to Unpack and Prepare the T640 Router for Installation on page 5
You can install the router in many types of racks, including a four-post rack or cabinet
or an open-frame rack.
The rack rails must be spaced widely enough to accommodate the router chassis's
external dimensions: 37.45 in. (95.6 cm) high, 31 in. (78.7 cm) deep, and 17.43 in. (44.3
cm) wide. The mounting brackets extend the width to fit into standard 19-in. (48.3
cm) racks.
The rack must be strong enough to support the weight of the fully configured router,
up to about 565 lb (256.3 kg). If you mount two routers in one rack, it must be capable
of supporting a combined weight of over 1100 lb (499 kg).
For service personnel to remove and install hardware components, there must be
adequate space at the front and back of the router. Allow at least 24 in. (61.0 cm) both
in front of and behind the router.
The rack or cabinet must have an adequate supply of cooling air.
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.
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.
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