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Hardware Installation Guide for the Cisco 4451-X Integrated Services Router
OL-27644-01
Chapter 2 Preparing for Router Installation
General Site Requirements
The Cisco ISR 4451-Xs are designed to meet the industry EMC, safety, and environmental standards
described in the Regulatory, Safety, and Compliance Information for Cisco 4451-X Integrated Services
Routers document.
Site Environmental Requirements
Environmental monitoring in the Cisco ISR 4451-X 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 the site maintains the environmental characteristics as shown in Table 2-1.
Table 2-1 Cisco ISR 4451-X Environmental Tolerances
Environmental Characteristic Minimum Maximum
Steady State Operating 0 degree C 50 degree C
(50 degrees C at 10,000
feet)
Storage –20 degrees C +70 degrees C
Humidity operating (noncondensing) 10% 90%
Humidity nonoperating (noncondensing) 5% 95%
Altitude operating: over allowable temperature
range (0 to 50 degrees C)
–500 feet 10,000 feet
Altitude, nonoperating: over allowable temperature
range
–1000 feet 50,000 feet
Thermal shock non-operating with change over time
of 3 minute
–25 degrees C +70 degrees C
Thermal Shock - Operating at 2.5 degree C per
minute
0 degrees C +50 degrees C