Rack-Mounting Guidelines; Precautions For Rack-Mounting; Rack Selection Guidelines - Cisco ASR-920-8S4Z-PD Hardware Installation Manual

Preparing for Installation
The electromagnetic pulse (EMP) generated by lightning or other high-energy phenomena can couple enough
energy into unshielded conductors to damage or destroy electronic equipment. If you have previously
experienced such problems, you should consult with RFI and EMI experts to ensure that you have adequate
electrical surge suppression and shielding of signal cables in your router operating environment.

Rack-Mounting Guidelines

The following sections provide guidelines for rack-mounting the router:

Precautions for Rack-Mounting

The following rack-mount guidelines are provided to ensure your safety:
• Ensure that the rack is level and stable before extending a component from the rack.
• Ensure that proper airflow is provided to the components in the rack.
• Do not step on or stand on any component or system when servicing other systems or components in a
• When mounting the router in a partially filled rack, load the rack from the bottom to the top, with the
• If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the

Rack Selection Guidelines

The router can be mounted in most two-post or four-post, 19-inch equipment racks that comply with the
Electronic Industries Association (EIA) standard for equipment racks (EIA-310-D19-inch). The rack must
have at least two posts with mounting flanges to mount the chassis.
Caution When mounting a chassis in any type of rack equipment, ensure that the inlet air to the chassis does not exceed
65° C.
The distance between the center lines of the mounting holes on the two mounting posts must be 18.31 inch ±
0.06 inch (46.50 cm ± 0.15 cm). The rack-mounting hardware included with the chassis is suitable for most
19-inch equipment racks.
Consider installing the router in a rack with the following features:
• NEBS-compliant, 19-inch wide (48.3-cm) rack.
• EIA hole patterns in the mounting rails. The required mounting hardware is shipped with the router.
• Leveling feet for stability.
Caution If you use an enclosed rack, ensure that the air flow requirements are maintained as discussed in Clearance
Guidelines.
Cisco ASR 920-10SZ-PD and Cisco ASR-920-8S4Z-PD Aggregation Services Router Hardware Installation Guide
rack.
heaviest component at the bottom of the rack.
unit in the rack.
Rack-Mounting Guidelines
25