Juniper-networks J4350 Bedienungsanleitung PDF herunterladen (Seite 92)

J4350 and J6350 Services Router Getting Started Guide

Rack Requirements

J4350 and J63 5 0 Services Routers must be i nstalled in a rack. Many types of

racks are acce

ptable, inclu ding front-mount racks, four-post (te lco) racks, and

center-mount racks.

The following sections describe rack requirements:

Rack Size and S

trength on p ag e 72

Connection to Building Structure on page 73

Rack Size and Strength

The Services Router is designed for installation in a rack that co mplies

with either of the following standards:

A 19-in. rack as defined in Cabinets, Racks, Panels, and Assoc iated Equipment

(document n u

mber 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 spac ed widely enough to accommodate the

router chassis’s external dimensions: 3.4 in high (8.7 cm), 17.4 in. wide

(44.3 cm),

and21.1in. (53.7cm)deep.

The outer e

dges of th e mou ntin g 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 c m ) beyond the mounting ears. Th e sp acing of rails and

adjacent

racks must also allow for the clearances around the router and

rack. (See “General Site Guidelines” on page 71.)

CAUTION: I

fyouaremountingtherouterinacabinet,besurethatventilation

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

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