Acx5448, Acx5448-D, And Acx5448-M Network Cable And Transceiver Planning - Juniper ACX5448-D Hardware Manual

Table 32: Rack Requirements for ACX5400 Routers (continued)
Rack Requirement Guidelines
Rack size and Ensure that the rack complies with the standards for a 19-in. rack as defined in Cabinets,
strength Racks, Panels, and Associated Equipment (document number EIA-310–D) published by the
Electronics Industry Association.
Use an 800-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 device'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 router chassis'
external dimensions. The outer edges of the front-mounting brackets extend the width to
19 in. (48.26 cm).
Ensure that for four-post installations, the front and rear rack rails are spaced between 23.6
in. (60 cm) and 36 in. (91.4 cm) front-to-back.
Ensure that the rack is strong enough to support the weight of the router. The fully configured
ACX5448 router weighs about 22.48 lb (10.2 kg), the ACX5448-D router weighs 23.14 lb
(10.5 kg), and the ACX5448-M router weighs 26.12 lb (11.85 kg).
Ensure that the spacing of rails and adjacent racks allows for proper clearance around the
router and rack.
Rack connection to Secure the rack to the building structure.
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.
ACX5448, ACX5448-D, and ACX5448-M Network
Cable and Transceiver Planning
IN THIS SECTION
Determining Transceiver Support for ACX5400 | 74
Cable Specifications for QSFP+ and QSFP28 Transceivers | 74
Calculating Power Budget and Power Margin for Fiber-Optic Cables | 76
Understanding Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion | 78
73