A Division of Cisco Systems, Inc.Broadband Routerwith 2 Phone PortsWIREDInstallation and Troubleshooting GuideModel No.RT31P2

Broadband Router with 2 Phone PortsCopyright and TrademarksSpecifications are subject to change without notice. Linksys is a registered trademark or trademark of Cisco Systems,Inc. and/or its affiliates in the U.S. and certain other countries. Copyright 2004 Cisco Systems, Inc. All rightsreserved. Other brands and product names are trademarks or registered trademarks of their respective holders.WARNING: This product contains chemicals, including lead, known to the State of California to causecancer, and birth defects or other reproductive harm. Wash hands after handling.How to Use this GuideYour guide to the Broadband Router has been designed to make understanding networking with the PhoneAdapter easier than ever. Look for the following items when reading this User Guide:This exclamation point means there is a caution or warning and issomething that could damage your property or the Router.This question mark provides you with a reminder about something youmight need to do while using the Router.This checkmark means there is a note of interest and is something youshould pay special attention to while using the Router.In addition to these symbols, there are definitions for technical terms that are presented like this:Also, each figure (diagram, screenshot, or other image) is provided with a figure number and description, likethis:word: definition.Figure numbers and descriptions can also be found in the “List of Figures” section.Figure 0-1: Sample Figure DescriptionRT31P2-UG-40729F JL

Broadband Router with 2 Phone Ports

Broadband Router with 2 Phone PortsTable of ContentsChapter 1: IntroductionWelcomeWhat’s in this Guide?Chapter 2: Networking Basics1125An Introduction to Local Area NetworksThe Use of IP Addresses55Chapter 3: Connecting the Phone Adapter7The Back PanelThe Front PanelChapter 4: Connecting the RouterOverviewConnection InstructionsChapter 5: Configuring the RouterOverviewHow to Access the Web-based UtilityThe Setup Tab - Basic SetupThe Setup Tab - DDNSThe Setup Tab - MAC Address CloneThe Setup Tab - Advanced RoutingThe Security Tab - FilterThe Security Tab - VPN PassthroughThe Voice TabThe Applications & Gaming Tab - Port Range ForwardingThe Applications & Gaming Tab - Port Triggering789910111113142123242628292930

Broadband Router with 2 Phone PortsThe Applications & Gaming Tab - UPnP ForwardingThe Applications & Gaming Tab - DMZThe Applications & Gaming Tab - QoSThe Administration Tab - ManagementThe Administration Tab - LogThe Administration Tab - Factory DefaultsThe Administration Tab - Firmware UpgradeThe Status Tab - VoiceThe Status Tab - RouterThe Status Tab - Local NetworkAppendix A: TroubleshootingCommon Problems and SolutionsFrequently Asked QuestionsAppendix B: Finding the MAC Address and IP Address for Your Ethernet AdapterWindows 98 or Me InstructionsWindows 2000 or XP InstructionsFor the Router’s Web-based UtilityAppendix C: Windows HelpAppendix D: GlossaryAppendix E: SpecificationsAppendix F: Warranty InformationAppendix G: Regulatory InformationAppendix H: Contact 656566666769757779818181

Broadband Router with 2 Phone PortsList of FiguresFigure 3-1: Back PanelFigure 3-2: Front PanelFigure 4-1: Router Connection DiagramFigure 4-1: Connect a PCFigure 4-2: Connect a TelephoneFigure 4-3: Connect the ModemFigure 4-4: Connect the PowerFigure 5-1: Router’s IP AddressFigure 5-2: Router LoginFigure 5-3: Setup Tab - Basic Setup (Obtain an IP automatically)Figure 5-4: Static IPFigure 5-5: PPPoEFigure 5-6: RAS (for Singtel)Figure 5-7: PPTPFigure 5-8: Heart Beat SignalFigure 5-9: Setup Tab - DDNS ( 5-10: Setup Tab - DDNS ( 5-11: Setup Tab - MAC Address CloneFigure 5-12: Setup Tab - Advanced RoutingFigure 5-13: Routing Table Entry ListFigure 5-14: Security Tab - FilterFigure 5-15: Filtered MAC Address78910101010131314151616171822222324252627

Broadband Router with 2 Phone PortsFigure 5-16: Security Tab - VPN PassthroughFigure 5-17: Voice TabFigure 5-18: Applications & Gaming Tab - Port Range ForwardingFigure 5-19: Applications & Gaming Tab - Port TriggeringFigure 5-20: Applications & Gaming Tab - UPnP ForwardingFigure 5-21: Applications & Gaming Tab - DMZFigure 5-22: Applications & Gaming Tab - QoSFigure 5-23: Administration Tab - ManagementFigure 5-24: Back up & Restore ConfigurationFigure 5-25: Administration Tab - LogFigure 5-26: Incoming Log TableFigure 5-27: Outgoing Log TableFigure 5-28: Administration Tab - Factory DefaultsFigure 5-29: Administration Tab - Firmware UpgradeFigure 5-30: Status Tab - VoiceFigure 5-31: Status Tab - RouterFigure 5-32: Status Tab - Local NetworkFigure 5-33: DHCP Active IP TableFigure B-1: IP Configuration ScreenFigure B-2: MAC/Adapter AddressFigure B-3: MAC/Physical AddressFigure B-4: MAC Address CloneFigure B-5: MAC Address 66

Broadband Router with 2 Phone PortsChapter 1: IntroductionWelcomeThank you for choosing the Broadband Router with 2 Phone Ports. This Router will allow your computers to sharea high-speed Internet connection as well as resources, including files and printers. And after you have set upyour Vonage service, you will be able to make phone or fax calls using your Internet connection.How does the Router do all of this? By connecting your computers and peripherals, including phones or faxmachines, to the Router and connecting the Router to your cable or DSL modem, then the Router can direct andcontrol communications for your network.But what does all of this mean?Networks are useful tools for sharing Internet access and computer resources. Multiple computers can shareInternet access, so you don’t need more than one high-speed Internet connection. With Internet phone service,your Internet access can now be shared by your phones or fax machines as well. You will be able to make phonecalls using the account you set up with your Internet phone service provider, even while you’re surfing theInternet. Plus, you can access one printer from different computers and access data located on anothercomputer’s hard drive. Networks are even used for playing multiplayer video games. So, networks not only areuseful in homes and offices, but also can be fun.PCs on a wired network create a LAN, or Local Area Network. They are connected with Ethernet cables, which iswhy the network is called “wired”.To create your network, install and set up the Router. To guide you through the process, Linksys stronglyrecommends that you run the Setup Wizard on the Setup CD-ROM. If you prefer to manually set up the Router,Chapter 1: IntroductionWelcomelan (local area network): the computersand networking products that make upthe network in your home or office.ethernet: an IEEE standard networkprotocol that specifies how data is placedon and retrieved from a commontransmission medium.1

Broadband Router with 2 Phone Portsuse the instructions in the Quick Installation or this Installation and Troubleshooting Guide to help you. Theseinstructions should be all you need to get the most out of the Router.What’s in this Guide?This guide covers the basic steps for setting up a network with a router. After going through “Chapter 3: Gettingto Know the Router,” most users will only need to use the following chapters: Chapter 4: Connecting the RouterThis chapter instructs you on how to connect the Router to your cable or DSL modem, PCs, and telephones(or fax machines). Chapter 5: Configuring the RouterThis chapter explains how to configure the Router using your web browser and the Router’s Web-basedUtility. You will configure the Router using the settings provided by your ISP.When you’re finished with the basic steps, then you are ready to connect to the Internet.You also have other chapter available for reference: Chapter 1: IntroductionThis chapter describes the Router’s applications and this Installation and Troubleshooting Guide. Chapter 2: Networking BasicsThis chapter briefly explains how a network functions. Appendix A: TroubleshootingThis appendix describes some possible problems and solutions, as well as frequently asked questions,regarding installation and use of the Router.2Chapter 1: IntroductionWhat’s in this Guide?

Broadband Router with 2 Phone Ports Appendix B: Finding the MAC Address and IP Address for Your Ethernet AdapterThis appendix instructs you on how to find the MAC address or Ethernet address of your PC’s Ethernetnetwork adapter. Appendix C: Windows HelpThis appendix describes how you can use Windows Help for instructions about networking, such asinstalling the TCP/IP protocol. Appendix D: GlossaryThis appendix gives a brief glossary of terms frequently used in networking. Appendix E: SpecificationsThis appendix provides the technical specifications for the Router. Appendix F: Warranty InformationThis appendix supplies the warranty information for the Router. Appendix G: Regulatory InformationThis appendix supplies the regulatory information regarding the Router. Appendix H: Contact InformationThis appendix provides contact information for a variety of Linksys resources, including Technical Support,as well as Vonage.Chapter 1: IntroductionWhat’s in this Guide?3

Broadband Router with 2 Phone Ports4Chapter 1: IntroductionWhat’s in this Guide?

Broadband Router with 2 Phone PortsChapter 2: Networking BasicsAn Introduction to Local Area NetworksSimply put, a router is a network device that connects two networks together.The Router connects your local area network (LAN), or the group of PCs in your home or office, to the Internet.The Router processes and regulates the data that travels between these two networks.The Router’s Network Address Translation (NAT) technology protects your network of PCs so users on theInternet cannot “see” your PCs. This is how your LAN remains private. The Router protects your network byinspecting the first packet coming in through the Internet port before delivery to the final destination on one ofthe Ethernet ports. The Router inspects Internet port services like the web server, ftp server, or other Internetapplications, and, if allowed, it will forward the packet to the appropriate PC on the LAN side.nat (network address translation): NATtechnology translates IP addresses of alocal area network to a different IPaddress for the Internet.The Use of IP AddressesIP stands for Internet Protocol. Every device in an IP-based network, including PCs, print servers, and routers,requires an IP address to identify its location, or address, on the network. This applies to both the Internet andLAN connections.There are two ways of assigning IP addresses to your network devices.A static IP address is a fixed IP address that you assign manually to a PC or other device on the network. Since astatic IP address remains valid until you disable it, static IP addressing ensures that the device assigned it willalways have that same IP address until you change it. Static IP addresses are commonly used with networkdevices such as server PCs or print servers.Chapter 2: Networking BasicsAn Introduction to Local Area Networksstatic ip address: a fixed addressassigned to a computer or device that isconnected to a network.5

Broadband Router with 2 Phone PortsIf you use the Router to share your cable or DSL Internet connection, contact your ISP to find out if they haveassigned a static IP address to your account. If so, you will need that static IP address when configuring theRouter. You can get the information from your ISP.A dynamic IP address is automatically assigned to a device on the network. These IP addresses are calleddynamic because they are only temporarily assigned to the PC or other device. After a certain time period, theyexpire and may change. If a PC logs onto the network (or the Internet) and its dynamic IP address has expired,the DHCP server will assign it a new dynamic IP address.A DHCP server can either be a designated PC on the network or another network device, such as the Router. Bydefault, the Router’s Internet Connection Type is Obtain an IP automatically (DHCP).The PC or network device obtaining an IP address is called the DHCP client. DHCP frees you from having toassign IP addresses manually every time a new user is added to your network.dynamic ip address: a temporary IPaddress assigned by a DHCP server.dhcp (dynamic host configurationprotocol): a protocol that lets one deviceon a local network, known as a DHCPserver, assign temporary IP addresses tothe other network devices, typicallycomputers.For DSL users, many ISPs may require you to log on with a user name and password to gain access to theInternet. This is a dedicated, high-speed connection type called Point to Point Protocol over Ethernet (PPPoE).PPPoE is similar to a dial-up connection, but PPPoE does not dial a phone number when establishing aconnection. It also will provide the Router with a dynamic IP address to establish a connection to the Internet.By default, a DHCP server (on the LAN side) is enabled on the Router. If you already have a DHCP server runningon your network, you MUST disable one of the two DHCP servers. If you run more than one DHCP server on yournetwork, you will experience network errors, such as conflicting IP addresses. To disable DHCP on the Router,see the Basic Setup section in “Chapter 5: Configuring the Router.”6Chapter 2: Networking BasicsThe Use of IP Addresses

Broadband Router with 2 Phone PortsChapter 3: Connecting the Phone AdapterThe Back PanelThe Router’s ports and the Reset button are located on the back panel of the Router.Figure 3-1: Back PanelInternetThis Internet port connects to your cable or DSL modem.Phone1For your primary Vonage line, the Phone1 port allows you to connect the Router to yourtelephone (or fax machine) using an RJ-11 telephone cable (not