Cisco XR 12416 - Manual (Page 7)

2-7
Cisco XR 12416 and Cisco XR 12816 Router Chassis Installation Guide
OL-17440-01
Chapter 2 Preparing for Installation
Site Requirement Guidelines
Laser Safety
Some line cards are equipped with ports that can emit hazardous laser radiation
from the aperture when there is no cable connected to the port. This invisible
radiation can cause eye injury if you stare into the port.
Warning To avoid eye injury, never stare into open line card ports.
Site Requirement Guidelines
This section provides the following site requirement guidelines that you must
consider before installing the router:
• Rack-Mounting Guidelines, page 2-7
• Air Flow Guidelines, page 2-14
• Temperature and Humidity Guidelines, page 2-16
• Power Connection Guidelines, page 2-16
• NEBS Supplemental Unit Bonding and Grounding Guidelines, page 2-21
• Site Wiring Guidelines, page 2-23
Rack-Mounting Guidelines
The router can be mounted in most 2-post, 4-post, or telco-type 19-inch
equipment racks that comply with the Electronics Industries Association (EIA)
standard for equipment racks (EIA-310-D). The rack must have at least two posts
with mounting flanges to mount the router chassis. The distance between the
center lines of the mounting holes on the two mounting posts must be 18.31 inches
± 0.06 inch (46.50 cm ± 0.15 cm). The rack-mounting hardware included with the
router is suitable for most 19-inch equipment racks or telco-style frames.
Figure 2-2 shows examples of typical 2-post, 4-post, and telco-type equipment
racks.