D-Link DSL-2640U User manual

Federal Communication Commission Interference Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this
device must accept any interference received, including interference that may cause undesired operation.
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment.
IMPORTANT NOTE:
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum
distance 20cm between the radiator & your body.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
IEEE 802.11b or 802.11g operation of this product in the U.S.A. is firmware-limited to channels 1 through 11.

Table of Contents
BEFORE YOU BEGIN .......................................................................................................1
PACKAGE CONTENTS .....................................................................................................1
SYSTEM REQUIREMENTS...............................................................................................1
FEATURES ........................................................................................................................2
HARDWARE OVERVIEW ..................................................................................................3
CONNECTIONS ................................................................................................................. 3
LED INDICATORS .............................................................................................................4
INSTALLATION..................................................................................................................5
INSTALLATION NOTES ....................................................................................................5
INFORMATION YOU WILL NEED FROM YOUR ADSL SERVICE PROVIDER................7
INFORMATION YOU WILL NEED ABOUT DSL-2640U....................................................8
INFORMATION YOU WILL NEED ABOUT YOUR LAN OR COMPUTER: .......................8
DEVICE INSTALLATION ...................................................................................................9
POWER ON ROUTER .......................................................................................................9
FACTORY RESET BUTTON..............................................................................................9
NETWORK CONNECTIONS ...........................................................................................10
INTRODUCTION TO WEB CONFIGURATION ................................................................ 11
PREPARATION BEFORE LOGIN.................................................................................... 11
LOGGING IN TO THE MODEM .......................................................................................12
FIRST-TIME LOGIN .........................................................................................................12
QUICK SETUP.................................................................................................................13
WAN INTERFACE SETUP ............................................................................................... 13
LAN INTERFACE SETUP................................................................................................23
WIRELESS INTERFACE SETUP.....................................................................................23
WAN SETUP SUMMARY.................................................................................................24
QUICK SETUP COMPLETION ........................................................................................24
DSL ROUTER DEVICE INFORMATION .......................................................................... 25
SUMMARY OF DEVICE INFORMATION ......................................................................... 25
WAN INTERFACE INFORMATION.................................................................................. 25
STATISTICS OF LAN.......................................................................................................26
STATISTICS OF WAN...................................................................................................... 26
STATISTICS OF ATM.......................................................................................................26
STATISTICS OF ADSL .................................................................................................... 27
ROUTE TABLE INFORMATION ...................................................................................... 28
ARP TABLE INFORMATION ...........................................................................................29
ADVANCED SETUP ........................................................................................................ 29
WAN CONFIGURATION .................................................................................................. 29
LAN CONFIGURATION ................................................................................................... 31
NAT .................................................................................................................................. 31
SECURITY .......................................................................................................................36
PARENTAL CONTROL.................................................................................................... 40
QUALITY OF SERVICE ................................................................................................... 41
ROUTING.........................................................................................................................50
DNS.................................................................................................................................. 51
DSL .................................................................................................................................. 54
PORT MAPPING.............................................................................................................. 54
IPSEC .............................................................................................................................. 57
CERTIFICATE .................................................................................................................. 58
WIRELESS.......................................................................................................................60
WIRELESS LAN BASICS................................................................................................ 60
WIRELESS – BASIC ....................................................................................................... 62
WIRELESS – SECURITY................................................................................................. 63
WIRELESS - MAC FILTER .............................................................................................. 69
WIRELESS – BRIDGE..................................................................................................... 69
WIRELESS – ADVANCED............................................................................................... 71
WIRELESS -- AUTHENTICATED STATIONS.................................................................. 72
DIAGNOSTICS ................................................................................................................ 73
MANAGEMENT ............................................................................................................... 73
SETTINGS .......................................................................................................................73
SYSTEM LOG.................................................................................................................. 75
TR-069 CLIENT ............................................................................................................... 77
INTERNET TIME.............................................................................................................. 77
ACCESS CONTROL........................................................................................................ 78
UPDATE SOFTWARE...................................................................................................... 80
SAVE/REBOOT ............................................................................................................... 81
TROUBLESHOOTING ..................................................................................................... 82
NETWORKING BASICS .................................................................................................. 83
CHECK YOUR IP ADDRESS .......................................................................................... 83
STATICALLY ASSIGN AN IP ADDRESS ....................................................................... 84
TECHNICAL SPECIFICATIONS ...................................................................................... 85

Product Overview
D-Link DSL-2640U User Manual 1
Before You Begin
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.
Package Contents
DSL-2640U ADSL Router
Power Adapter
CD-ROM with User Manual
One twisted-pair telephone cable used for ADSL connection
One straight-through Ethernet cable
One Quick Installation Guide
Warning: The Router must be used with the power adapter
included with the device.
System Requirements
•ADSL Internet service
•Computer with:
•200 MHz Processor
•64MB Memory
•CD-ROM Drive
•Ethernet Adapter with TCP/IP Protocol Installed
•Internet Explorer v6 or later, FireFox v1.5
•Computer with Windows 2000, Windows XP, or Windows Vista

Product Overview
D-Link DSL-2640U User Manual 2
1
Features
•PPP (Point-to-Point Protocol) Security – The DSL-2640U ADSL Router supports PAP (Password Authentication Protocol) and CHAP (Challenge Handshake
Authentication Protocol) for PPP connections. The Router also supports MSCHAP.
•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-2640U 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-2640U 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-2640U 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 an 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/if the Router functions as the sole connection to the Internet.
•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.
•Full Network Management – The DSL-2640U incorporates SNMP (Simple Network Management Protocol) support for web-based management and text-based
network management.
•Easy Installation – The DSL-2640U 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.

Product Overview
D-Link DSL-2640U User Manual 3
Hardware Overview
Connections

Product Overview
D-Link DSL-2640U User Manual 4
LED Indicators
Front Panel
Side Panel
LED Color Status Description
Off Power not supplied.
Green On Power supplied.
Power
Red On Not bootable or device is malfunction.
Status Blinking Green Traffic is passing through the device(INTERNET TRAFFIC)
Off No LAN link.
Blink Data is being transmitted through the LAN interface.
LAN 1/2/3/4 Green
On LAN link is established and active.
Off WLAN is disabled.
Blink WLAN traffic is flowing.
WLAN Green
On WLAN link is established.
Off DSL line is disconnected.
Blink DSL line is training.
DSL Green
On DSL line is connected.
Off The device is under the Bridge mode, DSL connection is not present, or the power is off.
Blink DSL traffic is flowing.
Green
On IP is connected.
Internet
Red On The device is attempted to become IP connected, but failed.
Off Device is ready for new WPS to setup.
Blink WPS is successfully triggered
WPS (on the side panel) Blue
On Connection is successfully established between the router and the client, the LED would remain in solid light for 5s.

Installation
D-Link DSL-2640U User Manual 5
Installation
This section will walk you through the installation process. Placement of the Wireless ADSL Router is very important. Do not place the Router in an enclosed area such
as a closet, cabinet, or in the attic or garage. Place the Wireless ADSL Router in a location where it can be easily connected to Ethernet devices, the telephone line as
well as to a power source.
Installation Notes
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 setup 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-2640U 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, Windows XP, and Windows Vista.
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 6.0, Netscape Navigator® version 6.2.3, or later versions. The web browser must have
JavaScript enabled. JavaScript is enabled by default on many browsers. Make sure JavaScript has not been 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.

Installation
D-Link DSL-2640U User Manual 6
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 as 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 or PPPoA 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.
Wireless LAN
Computers using the Wireless network can access the Internet or use the embedded 802.1g wireless access point. Wireless workstations must have an 802.1g or
802.1b wireless network card installed to use the Wireless ADSL Router. In addition the workstations must be configured to operate on the same channel and SSID as
the Wireless ADSL Router. If wireless security is used, the wireless workstations must be properly configured for the security settings used.

Installation
D-Link DSL-2640U User Manual 7
Information you will need from your ADSL service provider
Username
This is the Username used to log on to your ADSL service provider’s network. Your ADSL service provider uses this to identify your account.
Password
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.
WAN Setting / Connection Type
These settings describe the method your ADSL service provider uses to transport data between the Internet and your computer. Most users will use the default settings.
You may need to specify one of the following WAN Setting and Connection Type configurations (Connection Type settings listed in parenthesis):
•PPPoE/PPPoA (PPPoE LLC, PPPoE VC-Mux, PPPoA LLC or PPPoA VC-Mux)
•Dynamic IP Address (1483 Bridged IP LLC, 1483 Bridged IP VC-Mux)
•Static IP Address (1483 Bridged IP LLC, 1483 Bridged IP VC-Mux, 1483 Routed IP LLC (IPoA) or 1483 Routed IP VC-Mux)
•Bridge Mode (1483 Bridged IP LLC or 1483 Bridged IP VC Mux)
Modulation Type
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 (Auto Synch-Up) used for the Router automatically detects all types of ADSL, ADSL2, and ADSL2+ modulation.
Security Protocol
This is the method your ADSL service provider will use to verify your Username and Password when you log on to their network. Your Router supports the PAP and
CHAP protocols.
VPI
Most users will not be required to change this setting. The Virtual Path Identifier (VPI) is used in conjunction with the Virtual Channel Identifier (VCI) to identify the data
path between your ADSL service provider’s network and your computer. If you are setting up the Router for multiple virtual connections, you will need to configure the
VPI and VCI as instructed by your ADSL service provider for the additional connections. This setting can be changed in the WAN Settings window of the web
management interface.
VCI
Most users will not be required to change this setting. The Virtual Channel Identifier (VCI) used in conjunction with the VPI to identify the data path between your ADSL
service provider’s network and your computer. If you are setting up the Router for multiple virtual connections, you will need to configure the VPI and VCI as instructed by
your ADSL service provider for the additional connections. This setting can be changed in the WAN Settings window of the web management interface.

Installation
D-Link DSL-2640U User Manual 8
Information you will need about DSL-2640U
Username
This is the Username needed to access the Router’s management interface. When you attempt to connect to the device through a web browser you will be prompted to
enter this Username. The default Username for the Router is “admin.” The user cannot change this.
Password
This is the Password you will be prompted to enter when you access the Router’s management interface. The default Password is “admin.” The user may change this.
LAN IP addresses for the DSL-2640U
This is the IP address you will enter into the Address field of your web browser to access the Router’s configuration graphical user interface (GUI) using a web browser.
The default IP address is 192.168.1.1. 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.
LAN Subnet Mask for the DSL-2640U
This is the subnet mask used by the DSL-2640U, and will be used throughout your LAN. The default subnet mask is 255.255.255.0. This can be changed later.
Information you will need about your LAN or computer:
Ethernet NIC
If your computer has an Ethernet NIC, you can connect the DSL-2640U to this Ethernet port using an Ethernet cable. You can also use the Ethernet ports on the
DSL-2640U to connect to other computer or Ethernet devices.
DHCP Client status
Your DSL-2640U ADSL Router 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-2640U will assign are from 10.1.1.5 to 10.1.1.254. 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 you 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-2640U ADSL Router.

Installation
D-Link DSL-2640U User Manual 9
Device Installation
The Wireless ADSL Router maintains three separate interfaces, an ADSL, an Ethernet, and a Wireless LAN interface. Place the Wireless ADSL Router in a location
where it can be easily connected to Ethernet devices, the telephone line as well as to a power source.
The Router 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.
Power on Router
The Router must be used with the power adapter included with the device.
1. Connect the power adapter to the Power Input (12V DC, 1A) on the back panel of the Wireless ADSL Router and plug the other end of the power adapter to a
wall outlet or power strip.
2. Push the Power Button to turn the power on.
3. The Power LED on the front panel will shine bright green to indicate the device is powered on.
4. If the Ethernet port is connected to a working device, check the LAN LED indicator to make sure the connection is valid. The Wireless ADSL Router will attempt
to establish the ADSL connection, if the ADSL line is connected and the Wireless ADSL Router is properly configured the ADSL LED will light up after several
seconds. If this is the first time installing the device, some settings may need to be changed before the Wireless ADSL Router can establish a connection.
Factory Reset Button
The Router may be reset to the original factory default settings by using a ballpoint or paperclip to gently push down the reset button in the following sequence:
1. With the router powered on (check the Power LED to make sure it lights steady green), press and hold down the reset button using a paper clip or similar object
for about 6 to 8 seconds.
2. The router will restart. Watch the Power LED to verify that it is restarting.
3. When it is powered on again it is ready to be configured. The whole process takes about 30 seconds.
4. The device settings will be restored to the factory default IP address 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.”
Note: A factory reset will erase the current configuration settings and reset them to the default settings. After it has restarted, log in to the router’s web-based
management interface and use the Setup Wizard to configure the basic settings.

Installation
D-Link DSL-2640U User Manual 10
Network Connections
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 10/100BASE-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 higher than 10Mbps, 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. If you wish to reserve the uplink port on the switch or hub for
another device, connect to any on the other MDI-X ports (1x, 2x, etc.) with 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.
Wireless Connection to Router
The Router’s embedded 802.11g wireless access point should be configured to suit the local wireless network. All 802.11g or 802.11b devices that associate with the
Router’s wireless access point must have the same SSID and channel. If wireless security is used, the wireless clients must be configured with the correct security
information to use the Router. More information on configuring the wireless settings is found later in this manual.

Web Configuration
D-Link DSL-2640U User Manual 11
Introduction to Web Configuration
The first time you setup the Router. It is recommended that you configure the WAN connection using a single computer, to ensure that both the computer and the
Router are not connected to the LAN. Once the WAN connection operates 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.
Preparation Before Login
Before accessing the Modem, ensure the communication between PC and Modem is normal. Check the communication as follows.
Configure the IP address of the PC as 192.168.1.x (2~254), net mask as
255.255.255.0, gateway address as 192.168.1.1 (for customized
version, configure them according to the actual version).
Enter arp -a in the DOS window to check whether the PC can read the
MAC address of the Modem.
Ping the management IP address (192.168.1.1 by default) of the
Modem.
If the PC can read the MAC address of the Modem and can ping through
the management IP address of the Modem, that means the
communication of the PC and the Modem is normal.
Note: When you manage the Modem through Web, you must keep the Modem power on. Otherwise, the Modem may be damaged.

Web Configuration
D-Link DSL-2640U User Manual 12
Logging In to the Modem
The following description is a detail “How-To” user guide and is prepared for first time users.
First-Time Login
When you log in to the DSL Router for the first time, the login wizard appears.
Step 1 Open a Web browser on your computer.
Step 2 Enter http://192.168.1.1 (DSL router default IP address) in the address bar. The login
page appears.
Step 3 Enter a user name and the password. The default username and password of the super
user are admin and admin. The username and password of the common user are user
and user. You need not enter the username and password again if you select the option
Remember my password. It is recommended to change these default values after
logging in to the DSL router for the first time.
Step 4 Click OK to log in or click Cancel to exit the login page.
After logging in to the DSL router as a super user, you can query, configure, and modify all configurations, and diagnose the system.
You need to reboot the DSL router to enable your modification or configuration effective in some cases, for example, after you modify the PVC configuration. Some
modification, such as adding a static route, takes effect at once, and does not require modem reboot.

Web Configuration
D-Link DSL-2640U User Manual 13
Quick Setup
The Quick Setup page mainly includes the following three functions:
WAN interface setup
LAN interface setup
Wireless interface setup
Quick setup enables fast and accurate configuration of your Internet connection and other important parameters. The following sections describe these various
configuration parameters. Whether you configure these parameters or use the default ones, click Next to enable your Internet connection.
When subscribing to a broadband service, you should be aware of the method by which you are connected to the Internet. Your physical WAN device can be Ethernet,
DSL, or both. Technical information regarding the properties of your Internet connection should be provided by your Internet service provider (ISP). For example, your
ISP should inform you whether you are connected to the Internet by using a static or dynamic IP address, or the protocols, such as PPPOA or PPPoE, which you use to
communicate over the Internet.
WAN Interface Setup
During WAN interface setup, you can set up a PVC and its properties:
VPI
VCI
QoS
Internet connection type
Encapsulation type
IGMP service
NAT
Setting Up VPI/VCI and QoS
After logging in to the DSL router, if no PVC is configured previously and no default
settings exist, the Quick Setup webpage appears, which contains some basic
configuration that is needed by ATM PVC. The following introduction guides you
through the necessary steps to configure your DSL Router.

Web Configuration
D-Link DSL-2640U User Manual 14
According to your ISP instructions, specify the following parameters:
VPI (Virtual Path Identifier)
Virtual path between two points in an ATM network. The valid value range is from
0 to 255.
VCI (Virtual Channel Identifier)
Virtual channel between two points in an ATM network. The valid value range is
from 32 to 65535 (1 to 31 are reserved for known protocols).
Enable Quality Of Service
Enabling QoS for a PVC improves performance for selected classes of
applications. However, since QoS also consumes system resources, the number
of PVCs is reduced consequently. Use Advanced Setup/Quality of Service to
assign priorities for the applications.
For example, PVC 0/35 is to be modified and the default values of QoS remain. In
actual applications, you can modify them depending on your ISP instructions.
Selecting Internet Connection Type and Encapsulation Type
You can select your connection type from the following list. Each connect type
corresponds to several encapsulation types:
PPP over ATM (PPPoA)
PPPoA Encapsulation Mode: VC/MUX, LLC/ENCAPSULATION
PPP over Ethernet (PPPoE)
PPPoE Encapsulation Mode: LLC/SNAP-BRIDGING, VC/MUX
MAC Encapsulation Routing (MER)
MER Encapsulation Mode: LLC/SNAP-BRIDGING, VC/MUX
IP over ATM (IPoA)
IPoA Encapsulation Mode: LLC/SNAP-ROUTING, VC/MUX
Bridging
Bridging Encapsulation Mode: LLC/SNAP-BRIDGING, VC/MUX
For example, change the connection type of PVC 0/35 to Bridging. Select Bridging, and
set Encapsulation Mode to LLC/SNAP-BRIDGING (depending on the uplink
equipment).

Web Configuration
D-Link DSL-2640U User Manual 15
Internet Connection Type - PPP over ATM (PPPoA)
Step 5 In the PVC and its QoS configuration page, configure a PVC and its QoS.
Step 6 In the Internet connection type and encapsulation type page, set the Connection
Type to PPP over ATM (PPPoA) and select the encapsulation mode.

Web Configuration
D-Link DSL-2640U User Manual 16
Step 7 Click Next and the PPP information configuration page appears.
Your ISP should provide you with the following information:
PPP Username
PPP Password
Authentication Method
You can also select another service function as follows:
Dial on demand (with idle timeout timer)
PPP IP extension
Use static IP address
Retry PPP password on authentication error
Enable PPP debug mode
Step 8 Click Next and the PPPoA IGMP and WAN function configuration page appears.
To use IGMP service on pppoa pvc, select the Enable IGMP Multicast check box.

Web Configuration
D-Link DSL-2640U User Manual 17
Internet Connection Type - PPP over Ethernet (PPPoE)
Step 1 In the PVC and its QoS configuration page, configure a PVC and its QoS.
Step 2 In the Internet connection type and encapsulation type page, set the Connection Type
to PPP over Ethernet (PPPoE) and select the encapsulation mode.