Chapter 2 Overview of Cisco 1800 Series Routers (Modular)

Hardware Features

Boot/NVRAM—Serves two functions. It stores the ROM monitor, which allows you to boot an operating system software image from flash memory. It also stores the system configuration file and the virtual configuration register.

Table 2-3lists the memory specifications for Cisco 1800 series routers.

Table 2-3 Router Memory Specifications for the Cisco 1841 Router

Description

Specification

 

 

SDRAM

128 MB, expandable to 384 MB; default is 128 MB

 

 

Flash memory

32, 64, or 128 MB; default is 32MB

 

 

Boot/NVRAM

2/4 MB flash memory

 

 

Note SDRAM and the flash memory are user-upgradable, but the boot/NVRAM is permanently soldered to the router’s motherboard and is not upgradable.

Table 2-4 Router Memory Specifications for the Cisco 1861 ISR

Description

Specification

 

 

DRAM

512 MB

 

 

Flash memory

128 MB

 

 

LED Indicators

Table 2-5summarizes the LED indicators for the Cisco 1841 router that are located in the router bezel or chassis, but not in the interface cards.

For descriptions of the LEDs in the interface cards, see Cisco Interface Card Installation Guide.

 

 

 

 

Table 2-5

Summary of Cisco 1800 Series LED Indicators

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LED

 

Color

Description

Location:

 

 

 

 

 

 

 

 

 

 

 

 

 

SYS PWR

 

Green

Router has successfully booted and the software is functional.

Front

 

 

 

 

 

 

 

This LED blinks while booting or in the ROM monitor.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SYS ACT

 

Green

Blinking when any packets are transmitted or received on any

Front

 

 

 

 

 

 

 

WAN or LAN, or when monitoring system activity.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CF

 

Green

On when flash memory is busy. Do not remove the CompactFlash

Back

 

 

 

 

 

 

 

memory card when this light is on.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FDX (FE 0/0)

 

Green

On indicates full-duplex operation. Off indicates half-duplex

Back

 

 

 

 

 

 

 

operation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100 (FE 0/0)

 

Green

On indicates a 100-Mbps link. Off indicates a 10-Mbps link.

Back

 

 

 

 

 

 

 

 

 

 

 

 

 

Link (FE 0/0)

 

Green

On when the router is correctly connected to a local Ethernet

Back

 

 

 

 

 

 

 

LAN through Ethernet port 0.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FDX (FE 0/1)

 

Green

On indicates full-duplex operation. Off indicates half-duplex

Back

 

 

 

 

 

 

 

operation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cisco 1800 Series Routers (Modular) Hardware Installation Guide

 

 

 

 

 

 

 

 

2-6

 

 

 

 

 

 

OL-5876-03

 

 

 

 

 

 

 

 

 

Page 24
Image 24
Cisco Systems CISCO1841-HSEC/K9-RF manual LED Indicators, Description Specification, Color Description Location

CISCO1841-HSEC/K9-RF specifications

The Cisco Systems CISCO1841-HSEC/K9-RF is a versatile and robust router designed to meet the demands of small to medium-sized businesses and branch offices. This model is part of the Cisco 1800 Series Integrated Services Routers, which are known for their performance, security features, and scalability, making them ideal for organizations seeking to enhance their network infrastructure.

One of the main features of the CISCO1841-HSEC/K9 is its modular architecture. This design allows businesses to customize and expand their networks according to changing needs by adding various modules and interfaces. The router supports multiple WAN interfaces, which include serial, Ethernet, and DSL, providing flexible connectivity options to accommodate various networking scenarios.

The CISCO1841-HSEC/K9 also boasts an integrated security architecture. This router is equipped with advanced security features, including firewall capabilities, VPN support, and intrusion prevention systems. These technologies ensure that data is protected while being transmitted across the network. The built-in security features help organizations safeguard sensitive information against potential threats and cyberattacks.

In terms of performance, the CISCO1841-HSEC/K9 is powered by a high-speed processor and dynamic routing capabilities, which allow it to efficiently handle high volumes of traffic without compromising performance. The router supports various routing protocols, including EIGRP, OSPF, and BGP, facilitating seamless data flow and efficient route management.

Another noteworthy characteristic of the CISCO1841-HSEC/K9 is its support for voice and video services. This capability enables businesses to deploy unified communications applications, such as VoIP and video conferencing, enhancing collaboration among team members and improving overall productivity.

Moreover, the router is designed for easy management and monitoring. Cisco’s IOS software provides a user-friendly interface, allowing network administrators to configure, operate, and troubleshoot the network with ease. The router also supports Cisco’s Smart Install feature for simplified deployment and management.

In summary, the Cisco Systems CISCO1841-HSEC/K9-RF is a powerful and adaptable router that combines security, flexibility, and performance. Its modular design, robust security features, support for various routing protocols, and capabilities for multimedia applications make it a compelling choice for businesses looking to enhance their network infrastructure while addressing current and future demands.