Cisco 1921

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Americas Headquarters:

Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA

Installing and Upgrading Internal Modules and

FRUs in Cisco 1900 Series ISRs

First Published: May, 14, 2010

OL-22230-01

This document describes how to install or upgrade modules that are located internally within your Cisco

1900 series integrated services router, such as internal modules, memory, internal service modules

(ISMs), power supplies, and blowers. You need to remove the cover from the router to install or remove

any of these items. The document contains the following sections:

Note The Cisco 1905 ISR and Cisco 1921 ISR have no user- removable or user-installable components. Do

not remove the chassis cover.

• Safety Warnings, page 2

• Modules Internal to the Cisco 1905 and 1921 Routers, page 4

• Obtaining Documentation and Submitting a Service Request, page 24

Note To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance

and Safety Information for Cisco 1900 Series Integrated Services Routers document that accompanies

your router.

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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