D-Link DSL-G664T User Manual

DSL-G664T

Wireless ADSL Router

User’s Guide

(March 2004)

651G664T.015

FCC Warning

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with this user’s guide, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

CE Mark Warning

This is a Class A product. In a domestic environment, this product may cause radio interference in which case the user may be required to take adequate measures.

Warnung!

Dies ist ein Produkt der Klasse A. Im Wohnbereich kann dieses Produkt Funkstoerungen verursachen. In diesem Fall kann vom Benutzer verlangt werden, angemessene Massnahmen zu ergreifen.

Precaució n!

Este es un producto de Clase A. En un entorno domé stico, puede causar interferencias de radio, en cuyo case, puede requerirse al usuario para que adopte las medidas adecuadas.

Attention!

Ceci est un produit de classe A. Dans un environnement domestique, ce produit pourrait causer des interfé rences radio, auquel cas l`utilisateur devrait prendre les mesures adé quates.

Attenzione!

Il presente prodotto appartiene alla classe A. Se utilizzato in ambiente domestico il prodotto può causare interferenze radio, nel cui caso è possibile che l`utente debba assumere provvedimenti adeguati.

TABLE OF CONTENTS

ABOUT THIS USER’S GUIDE.....................................................................................I

BEFORE YOU START.................................................................................................I

INSTALLATION REQUIREMENTS.............................................................................I

PACKING LIST..........................................................................................................IV

INTRODUCTION.........................................................................................................1

Router Description and Operation........................................................................................................................1

Standards Compatibility and Compliance............................................................................................................3

Packing List..........................................................................................................................................4

Front Panel Display..............................................................................................................................................4

Rear Panel Connections........................................................................................................................................5

Introduction to 802.11b Wireless........................................................................................................6

802.11g Wireless..................................................................................................................................6

Wireless LAN Basics...........................................................................................................................................6

ADSL Technology................................................................................................................................................7

HARDWARE INSTALLATION....................................................................................8

Location................................................................................................................................................8

Power on Router...................................................................................................................................................9

Factory Reset Button............................................................................................................................................9

Network Connections.........................................................................................................................................10

Power On Router................................................................................................................................................11

Factory Reset Button..........................................................................................................................................11

BASIC ROUTER CONFIGURATION........................................................................12

Configuring IP Settings on Your Computer.......................................................................................................12

Access the Configuration Manager.................................................................................................18

Login to Home Page...........................................................................................................................................18

Configure the Router.........................................................................................................................19

Setup Menu.........................................................................................................................................................20

Wireless Settings................................................................................................................................................21

Wireless Security................................................................................................................................................22

Configure Connection 1 for PPPoA...................................................................................................................26

Change the Connection Type............................................................................................................27

Configure Connection 1 for PPPoE....................................................................................................................27

Configure Connection 1 for Bridge....................................................................................................................29

Configure Connection 1 for Static IP for WAN.................................................................................................30

Configure Connection 1 for DHCP for WAN....................................................................................................32

Configure Connection 1 for CLIP......................................................................................................................33

Create a New Connection..................................................................................................................34

DHCP Configuration for LAN.............................................................................................................36

Enable DHCP Relay...........................................................................................................................................37

Management IP...................................................................................................................................38

Save Configuration Changes............................................................................................................39

ADVANCED ROUTER MANAGEMENT...................................................................41

UPnP...................................................................................................................................................................42

LAN Clients........................................................................................................................................................43

Port Forwarding..................................................................................................................................................44

Access Control....................................................................................................................................................48

Advanced Security..............................................................................................................................................50

Bridge Filters......................................................................................................................................................51

Multicast Pass-through.......................................................................................................................................52

Static Routing.....................................................................................................................................................53

Dynamic Routing................................................................................................................................................54

Wireless Management........................................................................................................................55

Multiple Virtual Connections.............................................................................................................55

Tools and Utility Menus.....................................................................................................................57

User Management...............................................................................................................................................58

System Commands.............................................................................................................................................59

Remote Log........................................................................................................................................................60

Update Gateway.................................................................................................................................................61

Ping Test.............................................................................................................................................................62

Modem Test........................................................................................................................................................63

Status Menus......................................................................................................................................64

Network Statistics...............................................................................................................................................65

Connection Status...............................................................................................................................................66

DHCP Clients.....................................................................................................................................................67

Modem Status.....................................................................................................................................................68

Product Information............................................................................................................................................69

System Log.........................................................................................................................................................70

Help Menu..........................................................................................................................................................71

TECHNICAL SPECIFICATIONS...............................................................................72

IP ADDRESS SETUP................................................................................................74

IP CONCEPTS..........................................................................................................76

MICROFILTERS AND SPLITTERS..........................................................................79

DSL-G664T DSL Router User’s Guide

About This User’s Guide

This user’s guide provides instructions on how to install the DSL-G664T ADSL Router and use it to connect a computer or Ethernet LAN to the Internet.

If you are using a computer with a functioning Ethernet port, the quickest and easiest way to set up the DSLG664T is to insert the Installation CD into the CD-ROM drive of your computer and follow the instructions provided in the Quick Installation Guide.

Before You Start

Please read and make sure you understand all the prerequisites for proper installation of your new Router. Have all the necessary information and equipment on hand before beginning the installation.

Installation Overview

The procedure to install the Router can be described in general terms in the following steps:

1. Gather information and equipment needed to install the device. Before you begin the actual installation make sure you have all the necessary information and equipment.

2. Install the hardware, that is, connect the cables (Ethernet and telephone) to the device and connect the power adapter.

3. Check the IP settings on your computer and change them if necessary so the computer can access the web-based software built into the Router.

4. Use the web-based management software to configure the device to suit the requirements of your ADSL account.

Installation Requirements

In order to establish a connection to the Internet it will be necessary to provide information to the Router that will be stored in its memory. For some users, only their account information (Username and Password) is required. For others, various parameters that control and define the Internet connection will be required. You can print out the two pages below and use the tables to list this information. This way you have a hard copy of all the information needed to set up the Router. If it is necessary to reconfigure the device, all the necessary information can be easily accessed. Be sure to keep this information safe and private.

Low Pass Filters

Since ADSL and telephone services share the same copper wiring to carry their respective signals, a filtering mechanism may be necessary to avoid mutual interference. A low pass filter device can be installed for each telephone that shares the line with the ADSL line. These filters are easy to install passive devices that connect to the ADSL device and/or telephone using standard telephone cable. Ask your service provider for more information about the use of low pass filters with your installation.

Operating Systems

The DSL-G664T uses an HTML-based web interface for setup and management. The web configuration manager may be accessed using any operating system capable of running web browser software, including Windows 98 SE, Windows ME, Windows 2000, and Windows XP.

Web Browser

Any common web browser can be used to configure the Router using the web configuration management software. The program is designed to work best with more recently released browsers such as Opera, Microsoft Internet Explorer® version 5.0, Netscape Navigator® version 4.7, or later versions. The web browser must have JavaScript enabled. JavaScript is enabled by default on many browsers. Make sure JavaScript has not been

DSL-G664T DSL Router User’s Guide

disabled by other software (such as virus protection or web user security packages) that may be running on your computer.

Ethernet Port (NIC Adapter)

Any computer that uses the Router must be able to connect to it through the Ethernet port on the Router. This connection is an Ethernet connection and therefore requires that your computer be equipped with an Ethernet port as well. Most notebook computers are now sold with an Ethernet port already installed. Likewise, most fully assembled desktop computers come with an Ethernet NIC adapter as standard equipment. If your computer does not have an Ethernet port, you must install an Ethernet NIC adapter before you can use the Router. If you must install an adapter, follow the installation instructions that come with the Ethernet NIC adapter.

802.11b Wireless LAN Configuration

All the 802.11b wireless LAN settings may be configured on a single page using the web-based manager. For basic wireless communication you need to decide what channel to use and what SSID to assign. These two settings must be the same for any wireless workstations or other wireless access point that communicate with the DSL-G664T through the wireless interface.

Security for wireless communication can be accomplished in a number of ways. The DSL-G664T supports WEP encryption, 802.1X authentication, and WPA (Wi-Fi Protected Access). Wireless access can also be controlled by selecting MAC addresses that are allowed to associate with the device. Please read the section on Wireless Configuration.

Additional Software

It may be necessary to install software on your computer that enables the computer to access the Internet. Additional software must be installed if you are using the device a simple bridge. For a bridged connection, the information needed to make and maintain the Internet connection is stored on another computer or gateway device, not in the Router itself.

If your ADSL service is delivered through a PPPoE, PPPoA or CLIP (IPoA) connection, the information needed to establish and maintain the Internet connection can be stored in the Router. In this case, it is not necessary to install software on your computer. It may however be necessary to change some settings in the device, including account information used to identify and verify the connection.

All connections to the Internet require a unique global IP address. For bridged connections, the global IP settings must reside in a TCP/IP enabled device on the LAN side of the bridge, such as a PC, a server, a gateway device such as a router or similar firewall hardware. The IP address can be assigned in a number of ways. Your network service provider will give you instructions about any additional connection software or NIC configuration that may be required.

About CLIP Connections (RFC 1577)

Classical IP over ATM (CLIP) connections may require global IP settings for the device. Your service provider will give you IP settings information if needed. Some CLIP connections function like peer-to-peer connections and therefore do not require IP settings on the WAN interface.

DSL-G664T DSL Router User’s Guide

Information you will need from your ADSL service provider:

Username

Password

Connection Protocol

Modulation Type

Security Protocol

VPI

This is the Username used to log on to your ADSL service provider’s network. It is commonly in the form − user@isp.com. Your ADSL service provider uses this to identify your account.

This is the Password used, in conjunction with the Username above, to log on to your ADSL service provider’s network. This is used to verify the identity of your account.

This is the method your ADSL service provider uses to send and receive data between the Internet and your computer. Your Modem supports the following connection protocols: PPPoE, PPPoA, PPPoA with DHCP, Bridge, and CLIP (IPoA).

ADSL uses various standardized modulation techniques to transmit data over the allotted signal frequencies. Some users may need to change the type of modulation used for their service. The default DSL modulation (MMODE) used for the Router automatically detects all types of ADSL modulation. However, if you are instructed to specify the modulation type used for the Router, you have three alternatives: G.LITE, G.DMT and T1.413

This is the method your ADSL service provider will use to verify your Username and Password when you log on to their network. Your Modem supports the PAP and CHAP protocols.

This is the Virtual Path Identifier (VPI). It is used in conjunction with the Virtual Channel Identifier (VCI) below, to identify the data path between your ADSL service provider’s network and your computer.

Record info here

This is the Virtual Channel Identifier (VCI). It is used in

VCI

IP Address

(RADIUS server)

Port Secret

conjunction with the VPI above to identify the data path between your ADSL service provider’s network and your computer.

For 802.1X and WPA security.

For 802.1X and WPA security. For 802.1X and WPA security.

Information you will need about your DSL-G664T ADSL Router:

This is the Username needed access the Modem’s management interface. When you attempt to connect to the

Username

Password

LAN IP addresses for the DSL-G664T

device through a web browser you will be prompted to enter this Username. The default Username for the Modem is admin. This may be changed by the user.

This is the Password you will be prompted to enter when you access the Modem’s management interface. The default Password is admin. This may be changed by the user.

This is the IP address you will enter into the Address field of your web browser to access the Modem’s configuration graphical user interface (GUI) using a web browser. The default IP address is 192.168.1.1 and it is referred to as the “Management IP” address in this User’s Manual. This may be changed to suit any IP address scheme the user desires. This address will be the base IP address used for DHCP service on the LAN when DHCP is enabled.

Record info here

iii

DSL-G664T DSL Router User’s Guide

LAN Subnet Mask for the DSL-G664T

This is the subnet mask used by the DSL-G664T, and will be used throughout your LAN. The default subnet mask is

255.0.0.0. This can be changed later.

Information you will need about your LAN or computer:

If your computer has an Ethernet NIC, you can connect the DSL-G664T to this Ethernet port using an Ethernet cable.

Ethernet NIC

DHCP Client status

You can also use the Ethernet port on the DSL-G664T to connect to other Ethernet devices, such as a Wireless Access Point.

Your DSL-G664T ADSL Modem is configured, by default, to be a DHCP server. This means that it can assign an IP address, subnet mask, and a default gateway address to computers on your LAN. The default range of IP addresses the DSL-G664T will assign are from 192.168.1.2 to

192.168.1.254. Your computer (or computers) needs to be configured to Obtain an IP address automatically (that is, they need to be configured as DHCP clients.)

It is recommended that your collect and record this information here, or in some other secure place, in case you have to re-configure your ADSL connection in the future.

Once you have the above information, you are ready to setup and configure your DSL-G664T ADSL Router.

The Modem may be reset to its factory default settings by performing a Restore settings operation within the management interface (see System Commands). If you cannot

Note

gain access to the management interface, you may opt to use the Reset button on the rear panel of the device (see

錯誤! 找不到參照來源。

below).

Record info here

Packing List

Open the shipping carton and carefully remove all items. Make sure that you have the items listed here.

1. One DSL-G664T 802.11g Wireless ADSL Ethernet Router

2. One CD-ROM containing the User’s Guide

3. One twisted-pair telephone cable used for ADSL connection

4. One straight-through Ethernet cable

5. One AC power adapter suitable for your electric service

6. One Quick Installation Guide

Introduction

This section provides a brief description of the Router, its associated technologies and a list of Router features.

Router Description and Operation

The DSL-G664T ADSL Router is designed to provide a simple, cost-effective and secure ADSL Internet connection for wired (Ethernet) and wireless (802.11g) stations on your network. The DSL-G664T combines high-speed ADSL connection technology, TCP/IP routing and 802.11g wireless connectivity in one compact unit.

The Router is easy to install and use. The DSL-G664T connects to an Ethernet LAN via wireless and a standard Ethernet 10/100 BASE-T interface using RJ-45 connectors. The ADSL connection is made using ordinary twisted-pair telephone line with standard RJ-11 connectors. This arrangement allows wired and wireless workstations to share network resources and connect to the Internet using a single WAN interface and IP address.

The Router supports transparent bridging or it can be used for IP packet routing over the Internet. Cost saving features of the Router such as NAT (Network Address Translation) and DHCP (Dynamic Host Configuration Protocol) improve efficiency and security. The advanced security enhancements, packet filtering and port redirection, can help protect your network from potentially devastating intrusions by malicious agents outside your network.

All the 802.11g wireless settings for the Router are entered on a single page in the web manager. Security for the wireless interface comes in two forms, WEP Encryption and MAC Address Control.

What is ADSL?

Asymmetric Digital Subscriber Line (ADSL) is an access technology that utilizes ordinary copper telephone lines to enable broadband high-speed digital data transmission and interactive multimedia applications for business and residential customers.

ADSL greatly increases the signal carrying capacity of copper telephone lines without interfering with regular telephone services. For the ADSL user, this means faster downloads and more reliable connectivity. ADSL devices make it possible to enjoy benefits such as high-speed Internet access without experiencing any loss of quality or disruption of voice/fax telephone capabilities.

ADSL provides a dedicated service over a single telephone line operating at speeds of up to 8 Mbps downstream and up to 800 Kbps upstream, depending on local telephone line conditions. A secure point-to-point connection is established between the user and the central office of the service provider.

D-Link ADSL devices incorporate the recommendations of the ADSL Forum regarding framing, data format, and upper layer protocols.

Router Features

The DSL-G664T ADSL Router utilizes the latest ADSL enhancements to provide a reliable Internet portal suitable for most small to medium sized offices. DSL-G664T advantages include:

• PPP (Point-to-Point Protocol) Security – The DSL-G664T ADSL Router supports PAP (Password

Authentication Protocol) and CHAP (Challenge Handshake Authentication Protocol) for PPP connections.

• DHCP Support – Dynamic Host Configuration Protocol automatically and dynamically assigns all LAN IP

settings to each host on your network. This eliminates the need to reconfigure every host whenever changes in network topology occur.

• Network Address Translation (NAT) – For small office environments, the DSL-G664T allows multiple

users on the LAN to access the Internet concurrently through a single Internet account. This provides Internet access to everyone in the office for the price of a single user.

NAT improves network security in effect by hiding the private network behind one global and visible IP address. NAT address mapping can also be used to link two IP domains via a LAN-to-LAN connection.

• TCP/IP (Transfer Control Protocol/Internet Protocol) – The DSL-G664T supports TCP/IP protocol, the

language used for the Internet. It is compatible with access servers manufactured by major vendors.

• RIP-1/RIP-2 – The DSL-G664T supports both RIP-1 and RIP-2 exchanges with other routers. Using both

versions lets the Router to communicate with all RIP enabled devices.

• Static Routing – This allows you to select a data path to a particular network destination that will remain in

the routing table and never “ age out”. If you wish to define a specific route that will always be used for data traffic from your LAN to a specific destination within your LAN (for example to another router or a server) or outside your network (to a ISP defined default gateway for instance).

• Default Routing – This allows you to choose a default path for incoming data packets for which the

destination address is unknown. This is particularly useful when the Router functions as the sole connection to the Internet.

• ATM (Asynchronous Transfer Mode) – The DSL-G664T supports Bridged Ethernet over ATM

(RFC1483), IP over ATM (RFC1577) and PPP over ATM (RFC 2364).

• Precise ATM Traffic Shaping – Traffic shaping is a method of controlling the flow rate of ATM data cells.

This function helps to establish the Quality of Service for ATM data transfer.

• G.hs (Auto-handshake) – This allows the Router to automatically choose either the G.lite or G.dmt ADSL

connection standards.

• High Performance – Very high rates of data transfer are possible with the Router. Up to 8 Mbps

downstream bit rate using the G.dmt.

• Full Network Management – The DSL-G664T incorporates SNMP (Simple Network Management

Protocol) support for web-based management and text-based network management via an RS-232 or Telnet connection.

• Telnet Connection – The Telnet enables a network manager to access the Router’s management software

remotely.

• Easy Installation – The DSL-G664T uses a web-based graphical user interface program for convenient

management access and easy set up. Any common web browser software can be used to manage the Router.

Standards Compatibility and Compliance

The DSL-G664T complies with or is compatible with the following standards as recognized by their respective agencies.

• ITU G.992.1 (G.DMT) compliant

• ITU G.992.2 (G.lite “ Splitterless ADSL”) compliant

• ITU-T Rec. I.361 compliant

• RFC 791 Internet Protocol compliant

• RFC 792 UDP compliant

• RFC 826 Address Resolution Protocol compliant (ARP) compliant

• RFC 1058 Routing Information Protocol (RIP) compliant

• RFC 1334 PPP Authentication Protocol compliant

• RFC 1389 Routing Information Protocol 2 (RIP2) compliant

• RFC 1483 IP over AAL5/ Bridged Ethernet over AAL5 compliant

• RFC 1557 Classical IP over ATM (IPoA) compliant

• RFC 1661 Point to Point Protocol (PPP) compliant

• RFC 1877 Automatic IP assignment compliant

• RFC 1994 Challenge Handshake Authentication Protocol compliant

• Supports RFC 2131 and RFC 2132 DHCP functions including: automatic assignment of IP address, use of

subnet mask and default gateway and provision of DNS server address for all hosts

• RFC 2364 PPP over ATM compliant (PPPoA) compliant

• RFC 2516 PPP over Ethernet compliant (PPPoE) compliant

• RFC 2684 Bridged/Routed Ethernet over ATM compliant

• IEEE 802.3 compliant

• IEEE 802.3u compliant

• IEEE 802.1d compliant

• IEEE 802.3x compliant

• Embedded web server support

• Supports Dynamic Learning

• Supports Static Routing

• Supports NAT for up to 4096 connections

• Supports DHCP for up to 253 host connections

• Supports IGMP

• Supports DVMRP

• Supports ATM Forum UNI 3.1/4.0

• Supports ATM VCC (Virtual Channel Circuit) for up to eight sessions

• Supports TELNET and TFTP

• Supports back pressure for half-duplex

Packing List

Open the shipping carton and carefully remove all items. Make sure that you have the items listed here.

1. One DSL-G664T 802.11g Wireless ADSL Ethernet Router

2. One screw-on antenna

3. One CD-ROM containing the User’s Guide

4. One twisted-pair telephone cable used for ADSL connection

5. One straight-through Ethernet cable

6. One AC power adapter suitable for your electric service

7. One Quick Installation Guide

Front Panel Display

Place the Router in a location that permits an easy view of the LED indicators on the front panel. The LED indicators on the front panel include the Power, Status, ADSL Link/Act and WLAN (1-4) Link/Act

indicators. The ADSL and Ethernet indicators monitor link status and activity (Link/Act).

Power

Status

ADSL: Link/Act

LAN 1 - 4: Link/Act

Steady green light indicates the unit is powered on. When the device is powered off this remains dark.

Lights steady green during power on selftest (POST). Once the connection status has been settled, the light will blink green. If the indicator lights steady green after the POST, the system has failed and the device should be rebooted.

Steady green light indicates a valid ADSL connection. This will light after the ADSL negotiation process has been settled. A blinking green light indicates activity on the WAN (ADSL) interface.

A solid green light indicates a valid link on startup. These lights blink when there is activity currently passing through the Ethernet port.

Connect Ethernet

Rear Panel Connections

All cable connections to the Router are made at the rear panel. Connect the power adapter here to power on the Router. Use the Reset button to restore the settings to the factory default values in the next chapter for instructions on using the reset button).

Antenna

ADSL Port

Connect ADSL

cable here

Ethernet Ports

cables here

Factory

Reset Button

Power Cord

connects here

Note

The Router may be rebooted by disconnecting and then reconnecting the power.

Introduction to 802.11b Wireless

The IEEE 802.11b standard is the most widely used standard for wireless LANs today. A wireless LAN (WLAN) is a cellular computer network that transmits data using radio signals instead of cables. WLAN technology is commonly used in home, small office and large corporate networks. WLAN devices have a high degree of mobility and flexibility that allow networks to be quickly set up or dismantled and allow them to roam freely throughout the network.

Wireless LAN users can use the same network applications used on an Ethernet LAN. 802.11b adapter cards used on laptop and desktop computers support the same protocols as Ethernet adapter cards. For most users, there is no functional difference between a computer attached to a wired Ethernet LAN or a mobile 802.11b workstation except that hardware is not physically attached to the network. For most networks however, it may be desirable for mobile network devices to be able to link to the wired Ethernet LAN to use shared resources such as servers, printers or an Internet connection. The DSL-G664T unites Ethernet and 802.11b wireless private networks with an Internet connection.

D-Link Wireless LAN devices have earned a reputation for reliability, flexibility and value. D-Link offers a full range of IEEE 802.11b and IEEE 802.1a WLAN products including:

• 802.11b and 802.11a Wireless Adapter cards for notebook computers

• 802.11b and 802.11a Wireless PCI cards for desktop computers

• 802.11b and 802.11a Wireless Access Points

• Dual-band (802.11b plus 802.11a) Wireless Access Points

• 802.11b and 802.11a Wireless Home Gateways

• 802.11b and 802.11a Wireless ADSL Routers

802.11g Wireless

Today's 11-megabits-per-second 802.11b wireless networks are fine for broadband Internet access (which typically tops out at about 1 mbps) but rather slow for large internal file transfers or streaming video. However, 54-mbps, corporate-oriented 802.11a is expensive--and because its radio uses the 5-GHz band and 802.11b uses the 2.4-GHz band, upgrading to an 802.11a network means either scrapping 802.11b gear or buying even-pricier hardware that can support both standards.

But 802.11g promises the same speed as 802.11a and the ability to coexist with 802.11b equipment on one network, since it too uses the 2.4-GHz band.

802.11g is an extension to 802.11b, the basis of many wireless LANs in existence today. 802.11g will broaden

802.11b's data rates to 54 Mbps within the 2.4 GHz band using OFDM (orthogonal frequency division multiplexing) technology. Because of backward compatibility, an 802.11b radio card will interface directly with an 802.11g access point (and vice versa) at 11 Mbps or lower depending on range. You should be able to upgrade the newer 802.11b access points to be 802.11g compliant via relatively easy firmware upgrades.

Similar to 802.11b, 802.11g operates in the 2.4GHz band, and the transmitted signal uses approximately 30MHz, which is one third of the band. This limits the number of non-overlapping 802.11g access points to three, which is the same as 802.11b.

Wireless LAN Basics

Some basic understanding of 802.11b wireless technology and terminology is useful when you are setting up the Router or any wireless access point. If you are not familiar with wireless networks please take a few minutes to learn the basics.

Radio Transmission

WLAN devices use electromagnetic waves within a broad, unlicensed range of the radio spectrum to transmit and receive radio signals. When a wireless access point is present, it becomes a base station for the WLAN nodes

in its broadcast range. WLAN nodes transmit digital data using FM (frequency modulation) radio signals. WLAN devices generate a carrier wave and modulate this signal using various techniques. In this way, digital data can then be superimposed onto the carrier signal. This radio signal carries data to WLAN devices within range of the transmitting device. The antennae of WLAN devices listen for and receive the signal. The signal is demodulated and the transmitted data extracted. The transmission method used by the access point is called Direct Sequence Spread Spectrum (DSSS) and operates in a range of the radio spectrum between 2.4GHz and

2.5GHz for transmission. DSSS is the preferred method used on many 802.11b and 802.11g devices.

Range

Range should not be a problem in most homes or small offices. If you experience low or no signal strength in some areas, consider positioning the Router in a location between the WLAN devices that maintains a roughly equal straight-line distance to all devices that need to access the Router through the wireless interface. Adding more 802.11b access points to rooms where the signal is weak can improve signal strength. Read the section about placement of the Router titled Location in the next chapter, Hardware Installation, for more information.

SSID

Wireless networks use an SSID (Service Set Identifier) to allow wireless devices to roam within the range of the network. Wireless devices that wish to communicate with each other must use the same SSID. Several access points can be set up using the same SSID so that wireless stations can move from one location to another without losing connection to the wireless network.

The DSL-G664T operates in Infrastructure mode. It controls network access on the wireless interface in its broadcast area. It will allow access to the wireless network to devices using the correct SSID after a negotiation process takes place. The DSL-G664T broadcasts its SSID so that any wireless station in range can learn the SSID and ask permission to associate with it. Many wireless adapters are able to survey or scan the wireless environment for access points. An access point in Infrastructure mode allows wireless devices to survey that network and select an access point with which to associate.

It is important to understand the difference between the SSID and a BSSID (Basic Service Set Identifier) or Preferred BSSID. The Preferred BSSID is defined by wireless stations to designate an access point used for access to the wireless network. The Preferred BSSID is the MAC address of the access point. Therefore any wireless stations (wireless clients) that use the DSL-G664T through the wireless interface must use its MAC address for the Preferred BSSID. A wireless station that scans the network for available access points may present the user with a choice of access points identified by their BSSID.

ADSL Technology

Asymmetric Digital Subscriber Line (ADSL) is a broadband technology that utilizes ordinary copper telephone lines to enable high-speed digital data transmission and interactive multimedia applications for business and residential customers.

ADSL greatly increases the signal-carrying capacity of copper telephone lines for faster downloads and more reliable connectivity without interfering with regular telephone services. ADSL devices make it possible to enjoy benefits such as high-speed Internet access without experiencing any loss of quality or disruption of voice/fax telephone capabilities.

ADSL provides a dedicated service over a single telephone line operating at speeds of up to 8 Mbps downstream and up to 640 Kbps upstream, depending on local telephone line conditions. A secure point-to-point connection is established between the user and the central office of the service provider.

D-Link ADSL devices incorporate the recommendations of the ADSL Forum regarding framing, data format, and upper layer protocols.

Hardware Installation

The DSL-G664T functions on three separate networks: a wired Ethernet LAN, a wireless LAN and a wired ADSL WAN. Placement of the Router must take into account the fact that it is connected to these three networks with three types of media. Ethernet cables connect the Router to computers and network devices and the ADSL line connects it to a wall socket. In addition, the device must be near an AC wall outlet for power. How to accommodate these wired connections is often not a complicated matter. However, the added dimension of wireless communication does complicate the decision of Router placement.

Location

Many environmental factors can affect the effective wireless function of the DSL-G664T. If this is your first time setting up a wireless network device, read and consider the points listed below.

The access point can be placed on a shelf or desktop, ideally you should be able to see the LED indicators on the front if you need to view them for troubleshooting.

Designed to go up to 100 meters indoors and up to 300 meters outdoors, Wireless LAN lets you access your network from anywhere you want. However, the number of walls, ceilings, or other objects that the wireless signals must pass through can limit the signal range. Typical ranges vary depending on the types of materials and background RF noise in your home or business. To determine the range and signal strength, use these basic guidelines:

1. Keep the number of walls and ceilings to a minimum: The signal emitted from Wireless LAN devices can penetrate through ceilings and walls. However, each wall or ceiling can reduce the range of Wireless LAN devices from 1 to 30M. Position your wireless devices so that the number of walls or ceilings obstructing the signal path is minimized.

2. Consider the direct line between access points and workstations: A wall that is 0.5 meters thick, at a 45-degree angle appears to be almost 1 meter thick. At a 2-degree angle, it is over 14 meters thick. Be careful to position access points and client adapters so the signal can travel straight through (90º angle) a wall or ceiling for better reception.

3. Building Materials make a difference: Buildings constructed using metal framing or doors can reduce effective range of the device. If possible, position wireless devices so that their signal can pass through drywall or open doorways, avoid positioning them so that their signal must pass through metallic materials. Poured concrete walls are reinforced with steel while cinderblock walls generally have little or no structural steel.

4. Position the antennas for best reception. Play around with the antenna position to see if signal strength improves. Some adapters or access points allow the user to judge the strength of the signal.

5. Keep your product away (at least 1-2 meters) from electrical devices: Position wireless devices away from electrical devices that generate RF noise such as microwave ovens, monitors, electric motors, etc.

Power on Router

CAUTION: The Router must be used with the power adapter included with the device.

To power on the Router:

1. Insert the AC Power Adapter cord into the power receptacle located on the rear panel of the Router and plug the adapter into a suitable nearby power source.

2. You should see the Power LED indicator light up and remain lit. The Status LED should light solid green and begin to blink after a few seconds.

3. If the Ethernet port is connected to a working device, check the Ethernet Link/Act LED indicators to make sure the connection is valid. The Router will attempt to establish the ADSL connection, if the ADSL line is connected and the Router is properly configured this should light up after several seconds. If this is the first time installing the device, some settings may need to be changed before the Router can establish a connection.

Factory Reset Button

The Router may be reset to the original factory default settings by depressing the reset button for a few seconds while the device is powered on. Use a ballpoint or paperclip to gently push down the reset button. Remember that this will wipe out any settings stored in flash memory including user account information and LAN IP settings. The factory default IP address of the Router is 192.168.1.1 and the subnet mask is 255.255.255.0, the default management Username is admin and the default Password is admin.

If you wish to reserve the

uplink port on the switch or

hub for another device,

connect to any on the other

X ports (1x, 2x, etc.)

Network Connections

Network connections are provided through the ADSL port and the four Ethernet ports on the back of the Router. See the Rear Panel diagram above and the illustrations below for examples.

Connect ADSL Line

Use the ADSL cable included with the Router to connect it to a telephone wall socket or receptacle. Plug one end of the cable into the ADSL port (RJ-11 receptacle) on the rear panel of the Router and insert the other end into the RJ-11 wall socket. If you are using a low pass filter device, follow the instructions included with the device or given to you by your service provider. The ADSL connection represents the WAN interface, the connection to the Internet. It is the physical link to the service provider’s network backbone and ultimately to the Internet.

Connect Router to Ethernet

The Router may be connected to a single computer or Ethernet device through the 10/100 BASE-TX Ethernet port on the rear panel. Any connection to an Ethernet concentrating device such as a switch or hub must operate at a speed of 10/100 Mbps only. When connecting the Router to any Ethernet device that is capable of operating at speeds between 0~100Mbps, be sure that the device has auto-negotiation (NWay) enabled for the connecting port.

Use standard twisted-pair cable with RJ-45 connectors. The RJ-45 port on the Router is a crossed port (MDI-X). Follow standard Ethernet guidelines when deciding what type of cable to use to make this connection. When connecting the Router directly to a PC or server use a normal straight-through cable. You should use a crossed cable when connecting the Router to a normal (MDI-X) port on a switch or hub. Use a normal straight-through cable when connecting it to an uplink (MDI-II) port on a hub or switch.

The rules governing Ethernet cable lengths apply to the LAN to Router connection. Be sure that the cable connecting the LAN to the Router does not exceed 100 meters.

Hub or Switch to Router Connection

Connect the Router to an uplink port (MDI-II) on an Ethernet hub or switch with a straight-through cable as shown in the diagram below:

MDIwith a crossed cable.

Computer to Router Connection

You can connect the Router directly to a 10/100BASE-TX Ethernet adapter card (NIC) installed on a PC using the Ethernet cable provided as shown in this diagram.

Power On Router

To power on the Router:

1. Insert the AC Power Adapter cord into the power receptacle located on the rear panel of the Router and plug the adapter into a suitable nearby power source.

2. You should see the Power LED indicator light up and remain lit. The Status LED should light solid green and begin to blink after a few seconds.

3. If you have the Router connected to your network you can look at the Ethernet Link/Act LED and WLAN indicators to make sure they have valid connections. The Router will attempt to establish the ADSL connection, if the ADSL line is connected and the connection is properly configured this should light up after several seconds.

Factory Reset Button

The Router may be reset to the original factory default settings by depressing the reset button for a few seconds while the device is powered on. Use a ballpoint or paperclip to push down the reset button. Remember that this will wipe out any settings stored in flash memory including IP settings. The factory default IP address of the Router is 192.168.1.1 and the subnet mask is 255.255.255.0.

Basic Router Configuration

The first time you setup the Router it is recommended that you configure the WAN connection using a single computer making sure that both the computer and the Router are not connected to the LAN. Once the WAN connection is functioning properly, you may continue to make changes to Router configuration including IP settings and DHCP setup. This chapter is concerned with using your computer to configure the WAN connection. The following chapter describes the various menus used to configure and monitor the Router including how to change IP settings and DHCP server setup.

WAN Configuration Summary

1. Connect to the Router To configure the WAN connection used by the Router it is first necessary to

communicate with the Router through its management interface, which is HTML-based and can be accessed using a web browser. To access the management software your computer must be able to “ see” the Router. Your computer can see the Router if it is in the same “neighborhood” or subnet as the Router. This is accomplished by making sure your computer has IP settings that place it in the same subnet as the Router. The easiest way to make sure your computer has the correct IP settings is to configure it to use the DHCP server in the Router. The next section describes how to change the IP configuration for a computer running a Windows operating system to be a DHCP client.

2. Configure the WAN Connection Once your are able to access the configuration software you can

proceed to change the settings required to establish the ADSL connection and connect to the service provider’s network. There are different methods used to establish the connection to the service provider’s network and ultimately to the Internet. You should know what Encapsulation and connection type you are required to use for your ADSL service. It is also possible that you must change the PVC settings used for the ADSL connection. Your service provider should provide all the information you need to configure the WAN connection.

Configuring IP Settings on Your Computer

In order to configure your system to receive IP settings from the Router it must first have the TCP/IP protocol installed. If you have an Ethernet port on your computer, it probably already has TCP/IP protocol installed. If you are using Windows XP the TCP/IP is enabled by default for standard installations. Below is an illustrated example of how to configure a Windows XP system to automatically obtain IP settings from the Router. Following this example is a step-by-step description of the procedures used on the other Windows operating systems to first check if the TCP/IP protocol has been installed; if it is not, instructions are provided for installing it. Once the protocol has been installed you can configure the system to receive IP settings from the Router.

For computers running non-Windows operating systems, follow the instructions for your OS that configure the system to receive an IP address from the Router, that is, configure the system to be a DHCP client.

If you are using this Router to provide Internet access for more than one computer, you

Note

can use these instructions later to change the IP settings for the other computers. However, you cannot use the same IP address since every computer must have its own IP address that is unique on the local network.

Configure Windows XP for DHCP

Use the following steps to configure a computer running Windows XP to be a DHCP client.

1. From the Start menu on your desktop, go to Settings, then click on Network Connections.

2. In the Network Connections window, right-click on LAN (Local Area Connection), then click Properties.

3. In the General tab of the Local Area Connection Properties menu, highlight Internet Protocol

(TCP/IP) under “ This connection uses the following items:” by clicking on it once. Click on the Properties button.

4. Select “ Obtain an IP address automatically” by clicking once in the circle. Click the OK button.

Your computer is now ready to use the Router’s DHCP server.

Windows 2000

First, check for the IP protocol and, if necessary, install it:

1. In the Windows task bar, click the Start button, point to Settings, and then click Control Panel.

2. Double-click the Network and Dial-up Connections icon.

3. In the Network and Dial-up Connections window, right-click the Local Area Connection icon, and then select Properties.

4. The Local Area Connection Properties dialog box displays with a list of currently installed network components. If the list includes Internet Protocol (TCP/IP), then the protocol has already been enabled, skip ahead to Configure Windows 2000 for DHCP.

5. If Internet Protocol (TCP/IP) does not display as an installed component, click Install.

6. In the Select Network Component Type dialog box, select Protocol, and then click Add.

7. Select Internet Protocol (TCP/IP) in the Network Protocols list, and then click OK.

8. You may be prompted to install files from your Windows 2000 installation CD or other media. Follow the instructions to install the files.

9. If prompted, click OK to restart your computer with the new settings.

Configure Windows 2000 for DHCP

1. In the Control Panel, double-click the Network and Dial-up Connections icon.

2. In Network and Dial-up Connections window, right-click the Local Area Connection icon, and then select Properties.

3. In the Local Area Connection Properties dialog box, select Internet Protocol (TCP/IP), and then click Properties.

4. In the Internet Protocol (TCP/IP) Properties dialog box, click the button labeled Obtain an IP address automatically.

5. Double-click OK to confirm and save your changes, and then close the Control Panel.

Your computer is now ready to use the Router’s DHCP server.

Windows ME

First, check for the IP protocol and, if necessary, install it:

1. In the Windows task bar, click the Start button, point to Settings, and then click Control Panel.

2. Double-click the Network and Dial-up Connections icon.

3. In the Network and Dial-up Connections window, right-click the Network icon, and then select Properties.

4. The Network Properties dialog box displays with a list of currently installed network components. If the list includes Internet Protocol (TCP/IP), then the protocol has already been enabled. Skip ahead to Configure Windows ME for DHCP.

5. If Internet Protocol (TCP/IP) does not display as an installed component, click Add.

6. In the Select Network Component Type dialog box, select Protocol, and then click Add.

7. Select Microsoft in the Manufacturers box.

8. Select Internet Protocol (TCP/IP) in the Network Protocols list, and then click OK.

9. You may be prompted to install files from your Windows Me installation CD or other media. Follow the instructions to install the files.

10. If prompted, click OK to restart your computer with the new settings.

Configure Windows ME for DHCP

1. In the Control Panel, double-click the Network and Dial-up Connections icon.

2. In the Network and Dial-up Connections window, right-click the Network icon, and then select Properties.

3. In the Network Properties dialog box, select TCP/IP, and then click Properties.

4. In the TCP/IP Settings dialog box, click the Obtain and IP address automatically option.

5. Double-click OK twice to confirm and save your changes, and then close the Control Panel.

Your computer is now ready to use the Router’s DHCP server.

Windows 95 and Windows 98

First, check for the IP protocol and, if necessary, install it:

1. In the Windows task bar, click the Start button, point to Settings, and then click Control Panel. Double-click the Network icon.

2. The Network dialog box displays with a list of currently installed network components. If the list includes TCP/IP, and then the protocol has already been enabled, skip to Configure IP Information Windows 95, 98.

3. If TCP/IP does not display as an installed component, click Add. The Select Network Component Type dialog box displays.

4. Select Protocol, and then click Add. The Select Network Protocol dialog box displays.

5. Click on Microsoft in the Manufacturers list box, and then click TCP/IP in the Network Protocols list box.

6. Click OK to return to the Network dialog box, and then click OK again. You may be prompted to install files from your Windows 95/98 installation CD. Follow the instructions to install the files.

7. Click OK to restart the PC and complete the TCP/IP installation.

Configure Windows 95 and Windows 98 for DHCP

1. Open the Control Panel window, and then click the Network icon.

2. Select the network component labeled TCP/IP, and then click Properties.

3. If you have multiple TCP/IP listings, select the listing associated with your network card or adapter.

4. In the TCP/IP Properties dialog box, click the IP Address tab.

5. Click the Obtain an IP address automatically option.

6. Double-click OK to confirm and save your changes. You will be prompted to restart Windows.

7. Click Yes.

When it has restarted your computer is ready to use the Router’s DHCP server.

Windows NT 4.0 Workstations

First, check for the IP protocol and, if necessary, install it:

1. In the Windows NT task bar, click the Start button, point to Settings, and then click Control Panel.

2. In the Control Panel window, double-click the Network icon.

3. In the Network dialog box, click the Protocols tab.

4. The Protocols tab displays a list of currently installed network protocols. If the list includes TCP/IP, then the protocol has already been enabled. Skip to “ Configure IP Information”

5. If TCP/IP does not display as an installed component, click Add.

6. In the Select Network Protocol dialog box, select TCP/IP, and then click OK. You may be prompted to install files from your Windows NT installation CD or other media. Follow the instructions to install the files.

7. After all files are installed, a window displays to inform you that a TCP/IP service called DHCP can be set up to dynamically assign IP information.

8. Click Yes to continue, and then click OK if prompted to restart your computer.

Configure Windows NT 4.0 for DHCP

1. Open the Control Panel window, and then double-click the Network icon.

2. In the Network dialog box, click the Protocols tab.

3. In the Protocols tab, select TCP/IP, and then click Properties.

4. In the Microsoft TCP/IP Properties dialog box, click the Obtain an IP address automatically option.

5. Click OK twice to confirm and save your changes, and then close the Control Panel.

Access the Configuration Manager

Now that your computer’s IP settings allow it to communicate with the Router, you can access the configuration software.

Be sure that the web browser on your computer is not configured to use a proxy server in the Internet settings. In Windows Internet Explorer, you can check if a proxy server is enabled using the following procedure:

1. In Windows, click on the Start button, go to Settings and choose Control Panel.

2. In the Control Panel window, double-click on the Internet Options icon.

Note

To use the web-based management software, launch a suitable web browser and direct it to the IP address of the Router. Type in http:// followed by the default IP address, 192.168.1.1 in the address bar of the browser. The URL in the address bar should read: http://192.168.1.1.

3. Click the Connections tab and click on the LAN Settings button.

4. Verify that the “ Use proxy server” option is NOT checked. If it is checked, click in the checked box to deselect the option and click OK.

Alternatively, you can access this Internet Options menu using the Tools pull-down menu in Internet Explorer.

A new window will appear and you will be prompted for a user name and password to access the web-based manager.

Figure 3-1. Home - Login window

Use the default user name admin and password admin for first time setup. You should change the web-based manager access user name and password once you have verified that a connection can be established. The user name and password allows any PC within the same subnet as the Modem to access the web-based manger.

Do not confuse the user name and password used to access the web-based manager

Note

with the ADSL account user name and password needed for PPP connections to access the service provider’s network.

Configure the Router

The first page that appears after you successfully login displays information about the Router and its connection status. Tabs across the top of the screen show other available menus: Setup, Advanced, Tools, Status, and Help.

Figure 3-2. Home – Status Information window

When the Router is used to provide Internet access it actually must first access your service provider’s network, that is, it must communicate with computers and other routers owned by your service provider. These computers and routers then provide access to the Internet. The Router must be configured to communicate with the systems that give it access to the larger network. Click either the Setup tab (or the Go to setup wizard hyperlink); the Setup window will appear.

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