T640 Rack Requirements - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
Table 36: Site Preparation Checklist (continued)
Item or Task
If a rack is used, secure rack to floor and building
structure.
Cables
Acquire cables and connectors:
Determine the number of cables needed
based on your planned configuration.
Review the maximum distance allowed for
each cable. Choose the length of cable based
on the distance between the hardware
components being connected.
Plan the cable routing and management.
Related
Documentation

T640 Rack Requirements

82
For More Information
"T640 Rack Requirements" on
page 82
"Calculating Power Budget and
Power Margin for Fiber-Optic Cables"
on page 446
"Maintaining T640 PICs and PIC
Cables" on page 191
T640 Router Installation Summary on page 85
T640 Installation Safety Guidelines on page 390
The T640 Core Router can be installed in a rack or cabinet. Many types of racks are
acceptable, including four-post (telco) racks and open-frame racks. An example of an
open-frame rack is shown in
The router is designed for installation in a 19-in. rack as defined in Cabinets, Racks, Panels,
and Associated Equipment (document number EIA-310-D) published by the Electronics
Industry Association (
http://www.eia.org
With the use of adapters, the router is designed to fit into a 600-mm-wide rack, as defined
in the four-part Equipment Engineering (EE); European telecommunications standard for
equipment practice (document numbers ETS 300 119-1 through 119-4) published by the
European Telecommunications Standards Institute (
wing devices to narrow the opening between the rails.
The rack rails must be spaced widely enough to accommodate the router chassis's
external dimensions: 37.45 in. (95.1 cm) high, 31 in. (78.7 cm) deep, and 17.43 in. (44.3 cm)
wide. The outer edges of the mounting brackets extend the width to 19 in. (48.3 cm). The
spacing of rails and adjacent racks must also allow for the clearances around the router
and rack that are specified in
Maintenance" on page 83.
The chassis height of 37.45 in. (95.1 cm) is approximately 21.4 U. A U is the standard rack
unit defined in Cabinets, Racks, Panels, and Associated Equipment (document number
EIA-310-D) published by the Electronics Industry Association. You can stack two routers
in a rack that has at least 42.8 U (74.9 in. or 1.90 m) of usable vertical space.
Performed By
Figure 51 on page 83.
).
http://www.etsi.org
"T640 Clearance Requirements for Airflow and Hardware
Date
). Use approved
Copyright © 2013, Juniper Networks, Inc.