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Chapter 1: Introduction

What’s in this Guide?

•

Appendix A: Troubleshooting

This appendix describes some possible problems and solutions, as well as frequently asked questions,

regarding installation and use of the Phone Adapter.

•

Appendix B: Finding the MAC Address and IP Address for Your Ethernet Adapter

This appendix instructs you on how to find the MAC address or Ethernet address of your PC’s Ethernet

network adapter.

•

Appendix C: Windows Help

This appendix describes how you can use Windows Help for instructions about networking, such as

installing the TCP/IP protocol.

•

Appendix D: Glossary

This appendix gives a brief glossary of terms frequently used in networking.

•

Appendix E: Specifications

This appendix provides the technical specifications for the Phone Adapter.

•

Appendix F: Warranty Information

This appendix supplies the warranty information for the Phone Adapter.

•

Appendix G: Regulatory Information

This appendix supplies the regulatory information regarding the Phone Adapter.

•

Appendix H: Contact Information

This appendix provides contact information for a variety of Linksys resources, including Technical Support.

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Chapter 1: Introduction

What’s in this Guide?

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Phone Adapter with Router

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Chapter 2: Networking Basics

An Introduction to Local Area Networks

Chapter 2: Networking Basics

An Introduction to Local Area Networks

Simply put, a router is a network device that connects two networks together.

The Phone Adapter connects your local area network (LAN), or the group of PCs in your home or office, to the

Internet. The Phone Adapter processes and regulates the data that travels between these two networks.

The Phone Adapter’s Network Address Translation (NAT) technology protects your network of PCs so users on the

Internet cannot “see” your PCs. This is how your LAN remains private. The Phone Adapter protects your network

by inspecting the first packet coming in through the Internet port before delivery to the final destination on one of

the Ethernet ports. The Phone Adapter inspects Internet port services like the web server, ftp server, or other

Internet applications, and, if allowed, it will forward the packet to the appropriate PC on the LAN side.

The Use of IP Addresses

IP 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 and

LAN 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 a

static IP address remains valid until you disable it, static IP addressing ensures that the device assigned it will

always have that same IP address until you change it. Static IP addresses are commonly used with network

devices such as server PCs or print servers.

static ip address

: a fixed address

assigned to a computer or device that is

connected to a network.

nat

(network address translation): NAT

technology translates IP addresses of a

local area network to a different IP

address for the Internet.

ip

(internet protocol): a protocol used to

send data over a network.

ip address

: the address used to identify a

computer or device on a network.

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Chapter 2: Networking Basics

The Use of IP Addresses

If you use the Phone Adapter to share your cable or DSL Internet connection, contact your ISP to find out if they

have assigned a static IP address to your account. If so, you will need that static IP address when configuring the

Phone Adapter. 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 called

dynamic because they are only temporarily assigned to the PC or other device. After a certain time period, they

expire 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 Phone

Adapter. By default, the Phone Adapter’s Internet Connection Type is

DHCP

(obtain an IP address automatically).

The PC or network device obtaining an IP address is called the DHCP client. DHCP frees you from having to

assign IP addresses manually every time a new user is added to your network.

For DSL users, many ISPs may require you to log on with a user name and password to gain access to the

Internet. 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 a

connection. It also will provide the Phone Adapter 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 Phone Adapter. If you already have a DHCP server

running on your network, you MUST disable one of the two DHCP servers. If you run more than one DHCP server

on your network, you will experience network errors, such as conflicting IP addresses. To disable DHCP on the

Phone Adapter, see the Router - LAN Setup section in “Chapter 5: Using the Web-based Utility.”

dynamic ip address

: a temporary IP

address assigned by a DHCP server.

dhcp

(dynamic host configuration

protocol): a protocol that lets one device

on a local network, known as a DHCP

server, assign temporary IP addresses to

the other network devices, typically

computers.

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Chapter 3: Getting to Know the Phone Adapter

The Back Panel

Chapter 3: Getting to Know the Phone Adapter

The Back Panel

The Phone Adapter’s ports are located on the back panel.

PHONE 1/2

Use this

port to connect an analog phone (or fax machine) with an RJ-11 telephone cable.

ETHERNET

The

ETHERNET

port connects to a network device, such as a PC or a switch, with an

Ethernet network cable.

INTERNET

The

INTERNET

port connects to your cable or DSL modem.

Power

The

Power

port is where you will connect the power adapter.

Figure 3-1: Back Panel

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