Cisco 1921 User Manual

Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Modules Internal to the Cisco 1941 Router
9
Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Figure 5 Removing a DRAM UDIMM
Step 4 Place the UDIMM in an antistatic bag to protect it from ESD damage.
Installing a DRAM UDIMM
To install a DRAM UDIMM in a Cisco 1900 series router follow these steps:
Step 1 Remove the cover to gain access to the system board. If necessary see the “Opening and Closing the
Chassis” section on page 5.
Step 2 Locate the DRAM UDIMM connector on the system board. See the “Locating Modules” section on
page 7, for the location of the UDIMM connectors.
Step 3 Make sure that both latches on the UDIMM connector are in the open position.
Step 4 Orient the UDIMM so that the polarization notch lines up with the polarization key on the connector.
(See Figure 4.)
Step 5 Insert the UDIMM carefully into the connector.
Step 6 Carefully and firmly press the DRAM UDIMM into the connector until the latches close onto the
UDIMM. Make sure that both latches rotate to the closed position against the UDIMM. (See Figure 6.)
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Cisco 1921 Specifications

General

Product Type	Router
WAN Ports	2
Power Supply	AC 120/230 V (50/60 Hz)
Connectivity Technology	Wired
Data Link Protocol	Ethernet, Fast Ethernet, Gigabit Ethernet
Memory	256 MB DRAM
Flash Memory	128 MB
Expansion Slots	1 x ISM
USB Ports	2 x USB
Dimensions	4.4 x 33 x 24.9 cm
Network / Transport Protocol	IPSec
Remote Management Protocol	SNMP, Telnet, HTTP, HTTPS, SSH
Features	Firewall protection, VPN support
Compliant Standards	IEEE 802.1Q
Operating Temperature	0 to 40 °C
Storage Temperature	-20 to 65 °C
Humidity	10 to 85% (non-condensing)
Weight	3.5 kg
Performance	Up to 25 Mbps throughput