Cisco 1921 User Manual

Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Modules Internal to the Cisco 1941 Router
10
Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Figure 6 Installing a DRAM UDIMM
Step 7
When you finish installing modules, install the cover on the router. If necessary see the “Opening and
Closing the Chassis” section on page 5.
Installing and Removing ISMs
Internal Service Modules (ISMs) plug into an ISM connector on the system board as described in the
“Installing an ISM” section on page 12.
Before you remove or install an ISM, remove the chassis cover as described in the “Opening and Closing
the Chassis” section on page 5.
Note In the 1941W a WLAN module is installed in the ISM connector. It is not user removable.
Caution When you remove or install an ISM, always wear an ESD-preventive wrist strap, and ensure that it makes
good contact with your skin. Connect the equipment end of the wrist strap to the metal part of the chassis.
Caution Handle ISMs by the edges only. ISMs are ESD-sensitive components and can be damaged by
mishandling.
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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