Juniper J4350, Getting Started Manual

Page: 92 / 284

J4350 and J6350 Services Router Getting Started Guide
Rack Requirements
J4350 and J6350 Services Routers must be installed in a rack. Many types of
racks are acceptable, including front-mount racks, four-post (telco) racks, and
center-mount racks.
The following sections describe rack requirements:
Rack Size and Strength on page 72
Connection to Building Structure on page 73
Rack Size and Strength
The Services Router is designed for installation in a rack that complies
with either of the following standards:
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
)
A 600-mm 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
)
The horizontal spacing between the rails in a rack that complies with this
standard is usually wider than the router’s mounting ears, which measure
19 in. (48.2 cm) from outer edge to outer edge. Use approved wing devices to
narrow the opening between the rails as required.
The rack rails must be spaced widely enough to accommodate the
router chassis’s external dimensions: 3.4 in high (8.7 cm), 17.4 in. wide
(44.3 cm), and 21.1 in. (53.7 cm) deep.
The outer edges of the mounting ears extend the width of either chassis
to 19 in. (48.2 cm), and the front of the chassis extends approximately
0.5 in. (1.27 cm) beyond the mounting ears. The spacing of rails and
adjacent racks must also allow for the clearances around the router and
rack. (See “General Site Guidelines” on page 71.)
CAUTION: If you are mounting the router in a cabinet, be sure that ventilation
is sufficient to prevent overheating.
If a front-mount rack is used, we recommend supporting the back of the router
with a shelf or other structure.
72
Rack Requirements