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■ The distance between the mounting holes in the two posts must be 18.31 inches
±.063 inch, as specified in EIA-310-D.
■ An optional mounting kit is available for midchassis mounting. Contact your
Juniper Networks sales representative for more information.
Space Requirements
If you use an enclosed rack for the system, ensure that there is a minimum of 3
inches of clearance between the inner side wall and the system. This clearance space
ensures adequate air flow.
Proper Rack Installation
To confirm proper equipment rack installation, verify the following:
■ Racks are installed and electrically grounded according to manufacturer
instructions.
■ Equipment racks are anchored to the floor and, when possible, anchored to the
ceiling as well.
■ Equipment rack installations comply with applicable local, state, and national
codes.
Cabling Recommendations
Comply with the following recommendations:
■ Use only shielded cables.
■ Ensure that cable distance and rate limits meet IEEE-recommended maximum
distances and speeds for signaling purposes. For information about attenuation
and power loss in optical fiber cables see:
■ ANSI T1.646a-1997 Telecommunications – Broadband ISDN - Physical Layer
Specification for User-Network Interfaces Including DS1/ATM (1997)
■ ANSI T1.646-1995 Telecommunications – Broadband ISDN - Physical Layer
Specification for User-Network Interfaces Including DS1/ATM (1995)
■ Ensure that power cables deliver sufficient power to the system.
■ Attach laser fiber connectors only to Class 1 laser devices in accordance with
IEC 60825-1, Safety of Laser Products - Part 1.
■ Route cables so that they do not restrict ventilation or airflow.
Cabling Recommendations ■ 47
Chapter 9: Installation Guidelines and Requirements