T640 Clearance Requirements For Airflow And Hardware Maintenance; Figure 42: T640 Chassis Dimensions And Clearance Requirements - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide

T640 Clearance Requirements for Airflow and Hardware Maintenance

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68
When planning the installation site, you need to allow sufficient clearance around the
rack (see Figure 42 on page 68):
For the cooling system to function properly, the airflow around the chassis must be
unrestricted. Figure 39 on page 61 depicts the airflow in the router.
NOTE: If you mount the router in a cabinet, be sure that ventilation is
sufficient to prevent overheating.
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 cm) is required
both in front of and behind the router. NEBS GR-63 recommends that you allow at
least 30 in. (72.6 cm) in front of the rack and 24 in. (61.0 cm) behind the rack.

Figure 42: T640 Chassis Dimensions and Clearance Requirements

T640 Chassis Description on page 13
T640 Cooling System Description on page 61
Safety Requirements, Warnings, and Guidelines for Installing the T640 Router on
page 85
T640 Physical Specifications on page 341
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