Site Selection Guidelines; Airflow For Site Planning; Environmental Requirements - Cisco ASR-920-20SZ-M Hardware Installation Manual

Site Selection Guidelines

• Electrical service to the site complies with the safety with electricity requirements.
• The electrical circuit servicing the chassis complies with the power supply requirements.
• Console port wiring and cabling limitations have been considered in accordance to TIA/EIA-232F.
• The chassis Ethernet cabling distances are within prescribed limits.
• The equipment rack where the chassis is to be installed complies with prescribed requirements.
• When selecting rack location, safety, ease of maintenance, and proper airflow requirements have been
Site Selection Guidelines
The device requires specific environmental operating conditions. Temperature, humidity, altitude, and vibration
can affect the performance and reliability of the device.
The device is designed to meet the industry EMC, safety, and environmental standards.

Airflow for Site Planning

Table 2: Cisco ASR-920-20SZ-M Airflow
Device
ASR-920-20SZ-M

Environmental Requirements

Environmental monitoring of the chassis protects the system and components from damage due to excessive
voltage and temperature conditions. To ensure normal operation and avoid unnecessary maintenance, plan
and prepare your site configuration before installation. After installation, ensure that the environmental
characteristics continue to be met.
For an outside plant installation (cell site cabinet, hut, and so on), you require to protect the chassis against
airborne contaminants, dust, moisture, insects, pests, corrosive gases, polluted air, or other reactive elements.
We recommend that you install the unit in a fully sealed enclosure or cabinet. Examples of such cabinets
include IP65 cabinets with heat exchanger complying with Telcordia GR487. Temperature must be maintained
within –40ºC to 70ºC.
Place the device inside a space that is protected from direct weather and environmental stresses by an enclosure.
Ensure the operating climate as defined by Class 2 of GR-3108-CORE for premium variants.
• –40°C (-40°F) and 70°C (158°F)
• 5 and 85% RH
Ensure the operating climate as defined by Class 1 of GR-3108-CORE for base variants.
• –5°C (23°F) and 50°C (122°F)
Cisco ASR-920-20SZ-M Aggregation Services Router Hardware Installation Guide
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considered.
Feature
20GE SFP, 4Cu and 4-10GE: Modular
power supply
Prepare for Installation
Maximum System Airflow
(CFM) at Maximum System
Temperature
93.0