Site Selection Guidelines
The router require specific environmental operating conditions. Temperature, humidity, altitude, and vibration
can affect the performance and reliability of the router. The following sections provide specific information
to help you plan for the proper operating environment.
The routers are designed to meet the industry EMC, safety, and environmental standards described in the
Regulatory Compliance and Safety Information for the Cisco ASR 920 Series Router
document.
Environmental Requirements
Environmental monitoring of the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router
protects the system and components from damage caused by excessive voltage and temperature conditions.
To ensure normal operation and avoid unnecessary maintenance, plan and prepare your site configuration
before installation. After installation, make sure that the site maintains the environmental characteristics
described in
Cisco ASR-920-12SZ-IM Router Specifications
table.
For an outside plant installation (cell site cabinet, hut etc.), it is required that the router be protected against
airborne contaminants, dust, moisture, insects, pests, corrosive gases, polluted air or other reactive elements
present in the outside air. To achieve this level of protection, we recommend that the unit be installed in a
fully sealed enclosure or cabinet. Examples of such cabinets include IP65 cabinets with heat exchanger
complying with Telecordia GR487. Temperature must be maintained within
–
40º C to 70º C.
The equipment shall be placed inside a space protected from direct outside weather and environmental stresses
by an enclosure, and where the operating climate, as defined by Class 2 of GR-3108-CORE, is between
•
-40°C (-40°F) and 70°C (158°F)
•
5 and 90% RH
Physical Characteristics
Be familiar with the physical characteristics of the router to assist you in placing the system in the proper
location. For more information, see
Cisco ASR-920-12SZ-IM Router Specifications
table.
Air Flow Guidelines
Cool air is circulated through the router by fans located along the back side of the router.
The internal fans maintain acceptable operating temperatures for the internal components by drawing in cool
air through the vents, and circulating the air through the chassis.
Cisco ASR-920-12SZ-IM Aggregation Services Router Hardware Installation Guide
24
Preparing for Installation
Site Selection Guidelines
