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                        Cisco 831 Router and SOHO 91 
Router Hardware Installation Guide
Corporate Headquarters
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
http://www.cisco.com
Tel: 408 526-4000
800 553-NETS (6387)
Fax: 408 526-4100
Customer Order Number: DOC-7814784=
Text Part Number: 78-14784-02                                                                                                                                                                                                        
                    
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                        THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT  NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT  ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR  THEIR APPLICATION OF ANY PRODUCTS. THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION  PACKET THAT SHIPPED WITH THE PRODUCT AND ARE I
                    
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                        CCSP, CCVP, the Cisco Square Bridge logo, Follow Me Browsing, and StackWise are trademarks of Cisco Systems, Inc.; Changing the Way We  Work, Live, Play, and Learn, and iQuick Study are service marks of Cisco Systems, Inc.; and Access Registrar, Aironet, ASIST, BPX, Catalyst,  CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, Cisco Press, Cisco Systems, Cisco  Systems Capital, the Cisco Systems logo, Cisco Unity, Empowering the Internet Generatio
                    
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                        CONTENTS Preface xi Obtaining Documentation xiv Cisco.com xiv Documentation DVD xv Ordering Documentation xv Documentation Feedback xv Cisco Product Security Overview xvi Reporting Security Problems in Cisco Products xvi Obtaining Technical Assistance xvii Cisco Technical Support Website xvii Submitting a Service Request xviii Definitions of Service Request Severity xix Obtaining Additional Publications and Information xix Product Overview 1-1 Features 1-2 Router Overview 1-3 Front Panel 1-3 Bac
                    
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                        Contents Warnings 2-2 Preventing Electrostatic Discharge Damage 2-4 Unpacking the Box 2-5 Preventing Damage to the Router 2-6 Installing the Router 2-6 Connecting a Server, PC, or Workstation 2-6 Connecting an External Ethernet Switch (Optional) 2-8 Connecting to the Internet 2-10 Connecting a Broadband Modem 2-10 Connecting a Terminal or PC to the Console Port 2-11 Connecting the AC Adapter 2-12 Connecting the Console Port to an Async Modem 2-14 Checking the PC Configuration 2-16 Verifying Rout
                    
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                        Contents Specifications and Cables A-5 System Specifications A-5 LAN Port A-7 Console Connector Pinouts A-8 Cabling Specifications A-8 Ethernet Cable Specifications A-9 Maximum Cable Distance A-9 INDEX Cisco 831 Router and SOHO 91 Router Hardware Installation Guide 78-14784-02 ix                                                                                                                                                                                                                            
                    
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                        Contents Cisco 831 Router and SOHO 91 Router Hardware Installation Guide 78-14784-02 x                                                                                                                                                                                                                                                                                                                                                                                                                              
                    
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                        Preface This preface describes the audience, organization, and conventions used in this  guide. It also describes related documentation and how to access electronic  documentation. Audience This guide is intended for service technicians who have no experience installing  routers and whose goal is to connect the router to the network as quickly as  possible.  Organization This guide contains the following information: • Chapter 1, “Product Overview”—Describes the routers and their features.  Cha
                    
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                        Preface Conventions This section describes the conventions used in this guide. Note Means reader take note. Notes contain helpful suggestions or references to  additional information and material. Caution This symbol means reader be careful. In this situation, you might do something  that could result in equipment damage or loss of data.  Warning This warning symbol means danger. You are in a situation that could cause  bodily injury. Before you work on any equipment, be aware of the hazards  in
                    
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                        Preface Warnung Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die  zu einer Körperverletzung führen könnte. Bevor Sie mit der Arbeit an  irgendeinem Gerät beginnen, seien Sie sich der mit elektrischen  Stromkreisen verbundenen Gefahren und der Standardpraktiken zur  Vermeidung von Unfällen bewußt.  Avvertenza Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe  causare infortuni alle persone. Prima di lavorare su qualsiasi  apparecchiatura, occorre 
                    
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                        Preface Obtaining Documentation Related Documentation In addition to this Cisco 831 Router and SOHO 91 Router Hardware Installation  Guide, the Cisco 831 documentation set includes the following:  Cisco 831 Router and SOHO 91 Router Cabling and Setup Quick Start Guide  Cisco 800 Series Software Configuration Guide   Regulatory Compliance and Safety Information for Cisco 800 Series and  SOHO Series Routers   The latest version of the Cisco IOS Release Notes You might also need to refer to the
                    
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                        Preface Documentation Feedback Documentation DVD Cisco documentation and additional literature are available in a Documentation  DVD package, which may have shipped with your product. The Documentation  DVD is updated regularly and may be more current than printed documentation.  The Documentation DVD package is available as a single unit.  Registered Cisco.com users (Cisco direct customers) can order a Cisco  Documentation DVD (product number DOC-DOCDVD=) from the Ordering tool  or Cisco Market
                    
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                        Preface Cisco Product Security Overview You can submit comments by using the response card (if present) behind the front  cover of your document or by writing to the following address: Cisco Systems Attn: Customer Document Ordering 170 West Tasman Drive San Jose, CA 95134-9883 We appreciate your comments. Cisco Product Security Overview Cisco provides a free online Security Vulnerability Policy portal at this URL: http://www.cisco.com/en/US/products/products_security_vulnerability_policy.ht ml F
                    
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                        Preface Obtaining Technical Assistance  Nonemergencies—psirt@cisco.com Tip We encourage you to use Pretty Good Privacy (PGP) or a compatible product to  encrypt any sensitive information that you send to Cisco. PSIRT can work from  encrypted information that is compatible with PGP versions 2.x through 8.x.  Never use a revoked or an expired encryption key. The correct public key to use  in your correspondence with PSIRT is the one that has the most recent creation  date in this public key serve
                    
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                        Preface Obtaining Technical Assistance Access to all tools on the Cisco Technical Support Website requires a Cisco.com  user ID and password. If you have a valid service contract but do not have a user  ID or password, you can register at this URL: http://tools.cisco.com/RPF/register/register.do Note Use the Cisco Product Identification (CPI) tool to locate your product serial  number before submitting a web or phone request for service. You can access the  CPI tool from the Cisco Technical Supp
                    
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                        Preface Obtaining Additional Publications and Information For a complete list of Cisco TAC contacts, go to this URL: http://www.cisco.com/techsupport/contacts Definitions of Service Request Severity To ensure that all service requests are reported in a standard format, Cisco has  established severity definitions. Severity 1 (S1)—Your network is “down,” or there is a critical impact to your  business operations. You and Cisco will commit all necessary resources around  the clock to resolve the si
                    
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                        Preface Obtaining Additional Publications and Information  Packet magazine is the Cisco Systems technical user magazine for  maximizing Internet and networking investments. Each quarter, Packet  delivers coverage of the latest industry trends, technology breakthroughs, and  Cisco products and solutions, as well as network deployment and  troubleshooting tips, configuration examples, customer case studies,  certification and training information, and links to scores of in-depth online  resources
                    
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                        CH A P T E R 1 Product Overview The Cisco 831 router and Cisco SOHO 91 Ethernet-to-Ethernet routers can  connect a corporate telecommuter or small office to an Internet service provider  (ISP) over a broadband or Ethernet connection to the following sites:  Corporate LANs  The Internet The Cisco 831 and SOHO 91 routers are switch-capable routers that provide a  4-port Ethernet switch for the LAN. The routers are capable of bridging and  multiprotocol routing between LAN and WAN ports.  Cisco 8
                    
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                        Chapter 1      Product Overview Features Features Table 1-1 summarizes the features of these routers. Table 1-1 Feature Summary for Cisco 831 Router and SOHO 91 Router  Feature Description 10BASE-T/100BASE-T Provides connection to 10/100BASE-T (10/100-Mbps) Ethernet  built-in switch ports networks. Compatible with 10/100-Mbps devices. WAN port Provides connection to 10BASE-T. Compatible with 10-Mbps devices.  Can be connected to other network devices, such as cable modem,  ADSL, and router. Flas