Memory - Cisco CISCO1841 - 1841 Integrated Services Router Hardware Installation Manual

Chapter 1 Overview
Table 1-1 Summary of Cisco 1800 Series Fixed-Configuration Built-In Interfaces
Feature
Managed 8-port 10/100 Fast Ethernet
switch
10/100 Fast Ethernet (FE) WAN port
ADSL-over-POTS port
ADSL-over-ISDN port
G.SHDSL port
ISDN S/T port
V.92 analog modem port.
Console port
Auxiliary port
Two USB ports
Integrated 802.11a/b/g radio module
Internal Power-over-Ethernet (PoE)
module
Dying gasp
Wall-mount feature
Kensington security slot
Autosensing function

Memory

Cisco 1800 series fixed-configuration routers contain the following types of memory:
OL-6425-03
Description
Provides connection to 10/100BASE-T (10/100-Mbps) Ethernet networks.
Compatible with 10/100-Mbps devices.
Provides connection to 10/100BASE-T Ethernet networks. Can be connected to
other network devices, such as cable modem, ADSL, and router. Cisco 1801,
Cisco 1802, and Cisco 1803 routers have one 10/100 FE WAN port. Cisco 1811
and Cisco 1812 routers have two 10/100 FE WAN ports.
Cisco 1801 router only. Provides connection to an ADSL network. Does not
support the autoswitch function.
Cisco 1802 router only. Provides connection to an ADSL-over-ISDN network.
Does not support the autoswitch function.
Cisco 1803 router only. Provides 2-wire or 4-wire connection to a G.SHDSL
network.
Cisco 1801, Cisco 1802, Cisco 1803, and Cisco 1812 routers only. Should the main
WAN link go down, provides dial backup and remote management functions by
connecting to an ISDN service provider.
Cisco 1811 routers only. Should the main WAN link go down, provides dial backup
and remote management functions.
Provides a connection to the terminal or PC for software configuration or
troubleshooting using the command-line interface (CLI).
Provides a connection to a modem for software configuration or troubleshooting
using the command-line interface (CLI).
Cisco 1811 and Cisco 1812 routers only. Support Cisco USB flash memory
modules and USB eToken modules.
Wireless models only. Provides connectivity to a wireless LAN using IEEE
802.11a/b/g standards. Enables the router to act as an access point (AP) in
infrastructure mode.
(Optional) Provides inline power for powered devices, such as IP phones, that are
connected to the router.
Detects whether the router is about to lose power, and sends a signal to warn the
digital subscriber line access multiplexer (DSLAM) about the impending line drop.
Brackets for mounting the router on a wall or vertical surface.
Allows the router to be secured to a desktop or other surface by using Kensington
lockdown equipment.
Eliminates the need for a crossover cable and allows the router to detect
medium-dependent interface in normal mode (MDI) or medium-dependent
interface in crossover mode (MDIX) in any other PC or hub with a straight-through
cable or a crossover cable. The router is capable of bridging and multiprotocol
routing between the LAN and WAN ports.
Cisco 1800 Series Integrated Services Routers (Fixed) Hardware Installation Guide
Hardware Features
1-3