T640 Clearance Requirements For Airflow And Hardware Maintenance; T640 Environmental Specifications; Figure 53: T640 Chassis Dimensions And Clearance Requirements - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
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T640 Clearance Requirements for Airflow and Hardware Maintenance

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T640 Environmental Specifications

122
T640 Chassis Description on page 15
Installing the T640 Mounting Hardware for a Four-Post Rack or Cabinet on page 159
Installing the T640 Mounting Hardware for an Open-Frame Rack on page 162
When planning the installation site, you need to allow sufficient clearance around the
rack (see Figure 53 on page
For the cooling system to function properly, the airflow around the chassis must be
unrestricted. Figure 15 on page 32
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 53: T640 Chassis Dimensions and Clearance Requirements

T640 Chassis Description on page 15
T640 Cooling System Description on page 31
T640 Physical Specifications on page 119
Table 66 on page 123 specifies the environmental specifications required for normal router
operation. In addition, the site should be as dust-free as possible.
122):
depicts the airflow in the router.
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