Cisco 2821 Series User Manual

16
Installing and Upgrading Fans in the Cisco 2821 and Cisco 2851 Series Routers
78-18643-02
Upgrading the Cisco 2821 and Cisco 2851 Fan Unit
Removing the Fan Unit
After you remove the router cover, follow these steps to remove the fan unit.
Note Before you begin, read the safety warnings as described in the “Safety Warnings and Guidelines” section
on page 2.
Step 1 Locate the three fan connectors on the motherboard and remove them by lifting the connector away from
the receptacle, as shown in Figure 5.
Figure 5 Lifting the Connector from the Receptacle
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Cisco 2821 Series Specifications

General

Form Factor	Rack-mountable
Power Supply	AC 120/230 V (50/60 Hz)
Product Type	Router
Data Link Protocol	Ethernet, Fast Ethernet, Gigabit Ethernet
Operating System	Cisco IOS
Expansion Slots	4 x HWIC
Memory	256 MB (max 1 GB)
Network/Transport Protocol	L2TP, IPSec, PPPoE
Remote Management Protocol	SNMP, Telnet, HTTP, SSH
Encryption Algorithm	DES, 3DES, AES
Features	VPN support, Firewall protection, VLAN support, QoS
Flash Memory	64 MB (installed) / 128 MB (max)