M40e Rack Size and Strength
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 (
http://www.etsi.org
). Use approved
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: 35 in. (89 cm) high, 29 in. (73.6 cm) deep, and 17.5 in. (44.5 cm)
wide. The outer edges of the front support posts and center-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 “M40e Clearance
Requirements for Airflow and Hardware Maintenance” on page 71.
The chassis height of 35 in. (89 cm) is approximately 20 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 M40e
routers in a rack that has at least 40 U (70 in. or 1.78 m) of usable vertical space.
The rack must be strong enough to support the weight of the fully configured router, up
to approximately 360 lb (164 kg). If you stack two fully configured routers in one rack, it
must be capable of supporting about 720 lb (328 kg).
69
Copyright © 2010, Juniper Networks, Inc.
Chapter 5: Preparing the Site for M40e Router Installation
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