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Cisco 4221 ISR User Manual

Cisco 4221 ISR
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1-50
Hardware Installation Guide for the Cisco 4000 Series Integrated Services Router
OL-32185-02
Chapter 1 Overview of Cisco 4000 Series ISRs
Periodic Inspection and Cleaning
Periodic Inspection and Cleaning
To minimize the negative impact of environmental dust or debris, we recommend periodic inspection and
cleaning of the external surface of the router. The frequency of inspection and cleaning is dependent
upon the severity of the environmental conditions, but we recommend a minimum frequency of every six
months. Cleaning involves vacuuming of router air intake and exhaust vents. See the “Fans, Ventilation,
and Airflow” section on page 1-37.
Caution Sites with ambient temperatures consistently above 25°C or 77°F and with potentially high levels of dust
or debris may require periodic preventative maintenance cleaning.

Table of Contents

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Cisco 4221 ISR Specifications

General IconGeneral
Form FactorRack-mountable
WAN Ports2
LAN Ports2
RAM4 GB
Flash Memory4 GB
Product TypeRouter
Total Number of Ports4
Number of Network (RJ-45) Ports4
Number of Total Expansion Slots3
Expansion Slot TypeNIM, ISC
Number of NIM Slots2
Number of ISC Slots1
ManageableYes
Power SupplyInternal
Redundant Power SupplyNo
Authentication MethodRADIUS, TACACS+
Compliant StandardsIEEE 802.3, IEEE 802.3u, IEEE 802.3ab
Operating Temperature32°F to 104°F (0°C to 40°C)
Height1.75 in
Encryption AlgorithmAES, 3DES
Dimensions (W x D x H)1.75 x 13.5 x 1.73 inches
Operating Humidity5 to 95% (noncondensing)

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