Juniper PTX10003-160C, Руководство по оборудованию

Страница: 76 / 225

Table 24: Rack Requirements for the PTX10003
Guidelines Rack Requirement
Use a four-post rack that provides bracket holes or hole patterns spaced at 1-U (1.75 in. or
4.45 cm) increments and that meets the size and strength requirements to support the weight.
A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment
(document number EIA-310-D) published by the Electronics Components Industry Association
( http://www.ecianow.org/ ).
Rack type: four-post
The holes in the mounting brackets are spaced at 1 U (1.75 in. or 4.45 cm), so that the
PTX10003 can be mounted in any rack that provides holes spaced at that distance.
Mounting bracket
hole spacing
•
Ensure that the rack complies with the standards for a 19-in. rack as defined in Cabinets,
Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the
Electronics Components Industry Association ( http://www.ecianow.org/ ).
•
Use 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 brackets, which measure 19 in. (48.26 cm) from outer
edge to outer edge. Use approved wing devices to narrow the opening between the rails
as required.
•
Ensure that the rack rails are spaced widely enough to accommodate the PTX10003 chassis’
external dimensions. The outer edges of the front-mounting rails extend the width to 19 in.
(48.26 cm).
•
Ensure that the front and rear rack rails are spaced between 26 in. (66 cm) and 36 in. (91.4
cm) front-to-back.
•
Ensure that the rack is strong enough to support the weight of the PTX10003.
•
Ensure that the spacing of rails and adjacent racks allows for proper clearance around the
PTX10003 and rack.
Rack size and
strength
•
Secure the rack to the building structure.
•
If earthquakes are a possibility in your geographical area, secure the rack to the floor.
•
Secure the rack to the ceiling brackets as well as wall or floor brackets for maximum stability.
Rack connection to
building structure
77