D-Link DSL-2740U User manual

Version 1.0 | 04/09/2014
DSL-2740U
User Manual
Wireless N 300 ADSL2+ Modem Router

Table of Contents
SAFETY PRECAUTION...................................................................................................... 1
INTRODUCTION................................................................................................................. 1
SYSTEM REQUIREMENTS................................................................................................ 2
Features...................................................................................................................... 3
INSTALLATION.................................................................................................................. 4
Before You Begin........................................................................................................ 4
Installation Notes......................................................................................................... 4
Information you will need from your ADSL service provider........................................ 6
Information you will need about your DSL-2740U ADSL Router.............................. 7
Information you will need about your LAN or computer............................................... 8
Hardware Description and Installation......................................................................... 9
LED Indicators.................................................................................................... 9
Best Location for Wireless Operation.................................................................11
Connecting the Router.......................................................................................11
TCP/IP Configuration On A PC...................................................................................14
WEB CONFIGURATION....................................................................................................15
Accessing the Router.................................................................................................15
SETUP.......................................................................................................................16
Wizard-ADSL WAN............................................................................................16
Internet Setup-ADSL WAN ................................................................................22
Wizard-Ethernet WAN........................................................................................29
Internet Setup-Ethernet WAN............................................................................33
Local Network....................................................................................................37
Wireless Setup...................................................................................................41
Time and Date...................................................................................................44
ADVANCED ...............................................................................................................45
Advanced Wireless............................................................................................45
Access Control List............................................................................................49
Port Triggering ...................................................................................................51
Port Forwarding.................................................................................................52
DMZ...................................................................................................................52
Parental Control.................................................................................................53
Filtering Options.................................................................................................55
DoS Settings......................................................................................................57
DNS...................................................................................................................57
Dynamic DNS....................................................................................................59
Network Tools....................................................................................................60
Routing..............................................................................................................62
NAT....................................................................................................................65
MAINTENANCE.........................................................................................................67
System...............................................................................................................67
Firmware Update...............................................................................................68
Password...........................................................................................................68
Diagnostics........................................................................................................68
System Log........................................................................................................69
Logout................................................................................................................69
TROUBLESHOOTING ...................................................................................................... 70
NETWORKING BASICS ................................................................................................... 72
Check Your IP Address.............................................................................................72
Statically Assigning an IP Address............................................................................ 73
TECHNICAL SPECIFICATIONS....................................................................................... 74

Section 1 – Product Overview
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Safety Precaution
Follow the following instructions to prevent the device from risks and damage
•Use the power adapter in the package.
•An overburden power outlet or damaged lines and plugs may cause electric shock or fire accident. Check the power cords regularly. If you
find any damage, replace it at once.
•Proper space left for heat dissipation is necessary to avoid overheating. The holes on the device are designed for heat dissipation to ensure
running normally. Do not cover these heat dissipation holes.
•Do not put this device close to a heat source or high temperature place. Avoid the device direct exposing sunshine.
•Do not put this device close to over damp place. Do not spill any fluid on this device.
•Do not connect this device to PC or electronic product, unless our customer engineer or your broadband provider instructs you to do this,
because any wrong connection may cause power or fire risk.
•Do not place this device on an unstable surface or support.
Introduction
The DSL-2740U supports multiple line modes. With four 10/100 base-T Ethernet interfaces at the user end, the device provides high-speed ADSL
broadband connection to the Internet or Intranet for high-end users like net bars and office users. The DSL-2740U supports both DSL uplink access
and Ethernet uplink access. It provides high performance access to the Internet with a downstream rate of 24 Mbps and an upstream rate of 1 Mbps.
It complies with specifications of IEEE 802.11, 802.11b/g/n, WEP, WPA, and WPA2 security. The WLAN of the device supports 2T2R.

Section 1 – Product Overview
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System Requirements
Network Requirement
Available uplink access (DSL uplink or Ethernet uplink)
Clients to be connected
Devices installed a wireless network adapter or 10 base T/100BaseT Ethernet adapter.
Web-based Configuration
Utility Requirement
Computer with the following:
Windows®, Macintosh, or Linux-based operating system
An installed Ethernet adapter
Browser Requirements:
Microsoft Internet Explorer® v7, Mozilla® Firefox v9.0, Google® Chrome 16.0, or Safari® v4 or higher
version.
Windows®Users: Make sure you have the latest version of Java installed. Visit www.java.com to
download the latest version.

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1 Features
The device supports the following features:
•Various line modes
•Two uplink access: DSL and Ethernet uplink access
•External PPPoE dial-up access
•Internal PPPoE/PPPoA dial-up access
•1483Bridged/1483Routed with dynamic IP or static IP
•Multiple PVCs (the number of PVCs support is eight)
•DHCP server/relay
•Static route
•Network Address Translation(NAT)
•DMZ
•Virtual Server
•Universal plug and play (UPnP)
•Dynamic Domain Name Server(DDNS)
•Network Time Protocol(NTP)
•Firmware upgrading through Web, TFTP, or FTP
•Resetting to the factory defaults through Reset button or Web
•Diagnostic test
•Web interface
•Telnet CLI
•IP/MAC/URL Filter
•Application layer service
•QoS
•Port binding
•Auto upgrade
•Digital Living Network Alliance (DLNA)
•Wireless network

Section 2 – Installation
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Installation
This section will guide you through the installation process. Placement of the Router is very important. Do not place the Router in an enclosed area
such as a closet, cabinet or in the attic or garage.
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.
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 a standard telephone cable. Ask your service provider for more
information about the use of low pass filters with your installation.
Operating Systems
The DSL-2740U 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, Windows Vista,
Windows 7, and Windows 8.

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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. If your computer does not have
an Ethernet port, you must install an Ethernet NIC adapter before you can use the Router. If you need to install an adapter, follow the installation
instructions that come with the Ethernet NIC adapter.
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.

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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, PPPoA LLC or PPPoA VC-Mux)
 Bridge Mode (1483 Bridged IP LLC or 1483 Bridged IP VC Mux)
 IPoA/MER (Static IP Address) (Bridged IP LLC, 1483 Bridged IP VC Mux, 1483 Routed IP LLC, 1483 Routed IP VC-Mux or IPoA)
 MER (Dynamic IPAddress) (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 (ADSL2+ Multi-Mode) 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 yourADSL 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) is 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
Setup window of the web management interface.

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Information you will need about your
DSL-2740U ADSL Router
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.”
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-2740U
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-2740U
This is the subnet mask used by the DSL-2740U and will be used throughout your LAN. The default subnet mask is 255.255.255.0.

Section 2 – Installation
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Information you will need about your LAN or computer
Ethernet NIC
If your computer has an Ethernet NIC, you can connect the DSL-2740U to the Ethernet port using an Ethernet cable.
DHCP Client status
Your DSL-2740U 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-2740U 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 you backup or 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-2740U ADSL Router.

Section 2 – Installation
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Hardware Description and Installation
LED Indicators
Note:
The figures in this document are for reference only.
Figure 1 Front panel
The following table describes the LEDs of the device.
LED
Color
Status
Description
Power
Green
On
The initialization of the system is complete.
Red
On
The device is powered on.
Blinking
The firmware is upgrading.
LAN Green
Off
The Ethernet interface is not properly connected.
Blinking
The Ethernet interface is properly connected and data is being transmitted.
On
The Ethernet interface is properly connected, but no data is being transmitted.
2.4GHz Green
Blinking
The WLAN function is enabled and data is being transmitted on the WLAN.
On
The WLAN function is enabled, but no data is being transmitted on the WLAN.
Off
The WLAN function is disabled.
WPS Green
Blinking
WPS is successfully triggered.
Solid on for 5
seconds and
then turns off
Connection is successfully established between the router and the client through WPS.
DSL Green
Off
No signal is being detected.
Blinking
The device is handshaking with the physical layer of the office end.
On
A connection is set up with the physical layer of the office end.
Green
Off
The device is under the Bridge mode or powered off.
On
A connection is set up and no traffic is detected.

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LED
Color
Status
Description
Internet
Red
On
The authentication of the PPP dial-up is failed or MER is failed to obtain the correct IP
address.
Off
The WLAN function is disabled.
Blinking
A connection is set up and data is being transmitted.
Off
No signal is detected.
Figure 2 Rear panel
The following table describes the interfaces of the device.
Interface/Button
Description
DSL
RJ-11 interface for connecting the host to the telephone jack on the wall or the MODEM interface of the
splitter through a telephone line.
LAN/WAN
This Ethernet RJ-45 interface has two functions.
Worked as a WAN interface that connects to the WAN for Ethernet uplink
Worked as a LAN interface that connects to the Ethernet interfaces of computers or Ethernet devices.
LAN3/2/1
For a PC or other Ethernet-abled device to join the LAN of 2740U by being connected to this interface with
RJ-45 cable.
WPS
Press and hold the button for 5 seconds starts WPS negotiation.
WIRELESS ON/OFF
Press and hold the button for 5 seconds starts WLAN.
ON/OFF
Power switch, which is used to power on or power off the host.
12V DC IN (power)
Interface for connecting the power adapter.
Reset (On the bottom side)
Press and hold the button for 1 second to restore the factory defaults.

Section 2 – Installation
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Best Location for Wireless Operation
Many environmental factors may affect the effective wireless function of the DSL Router. If this is the first time that you set up a wireless network
device, read the following information:
The access point can be placed on a shelf or desktop, ideally you should be able to see the LED indicators in the front, as you may 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 numbers of walls, ceilings, or other objects that the wireless signals must pass through limit signal range. Typical ranges vary
depending on types of materials and background RF noise in your home or business.
Connecting the Router
•DSL Uplink Connection
The following figure displays the application diagram for the connection of the device, PC, splitter and telephone sets, when no telephone set is
placed before the splitter.
Figure 3 DSL uplink connection

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Step 1 Connect the DSL port of the router and the Modem port of the splitter through a telephone cable; connect the phone to the phone port of
the splitter through a telephone cable; and connect the Line port of the splitter to the uplink telephone jack on the wall.
The spliter has three ports:
LINE: Connect to a wall phone jack (RJ-11 jack)
MODEM: Connect to the Line interface of the router
PHONE: Connect to a telephone set
Step 2 Connect the LAN port of the router to the network interface card (NIC) of the PC through an Ethernet cable (MDI/MDIX).
Step 3 Plug the power adapter to the wall outlet and then connect the other end of it to the Power (12V DC IN) port of the route.
•Ethernet Uplink Connection
The following figure displays the Ethernet uplink connection.
Figure 4 Ethernet uplink connection

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Step 1 Connect the LAN interface of the wireless router to your PC with RJ45 Ethernet cable.
Step 2 Connect the LAN/WAN interface of the wireless router to the uplink network device with RJ45 Ethernet cable.
Step 3 Connect the power adapter to the 12V DC IN interface of the wireless router.

Section 3 – Web Configuration
D-Link DSL-2740U User Manual
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TCP/IP Configuration On A PC
Each network interface on the PC should either be configured with a statically defined IP address and DNS address, or be instructed to automatically
obtain an IP address using the network DHCP server. DSL router provides a DHCP server on its LAN and it is recommended to configure your LAN
to automatically obtain its IP address and DNS server IP address.
The configuration principle is identical but should be carried out differently on each operating system.
The following displays the TCP/IP Properties dialog box on Windows XP.
TCP/IP configuration steps for Windows XP are as follows:
Step 1 Choose Start > Control Panel > Network Connections.
Step 2 Right-click the Ethernet connection icon and choose Properties.
Step 3 On the General tab, select the Internet Protocol (TCP/IP) component and
click Properties. The Internet Protocol (TCP/IP) P
roperties window
appears.
Step 4 Select the Obtain an IP address automatically button.
Step 5 Select the Obtain DNS server address automatically button.
Click OK to save the settings.

Section 3 – Web Configuration
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Web Configuration
This chapter describes how to use Web-based management of the DSL router, which allows you to configure and control all of DSL router features
and system parameters in a user-friendly GUI.
Accessing the Router
The following description is a detail “How-To” user guide and is prepared for first time users.
Step 1
Open the Internet Explorer (IE) browser, and then go
to http://192.168.1.1.
Step 2 The Login page is shown as the figure appears on the right. Enter the
username and password. And then click OK.
The default username and password are admin and admin.
Step 3 After logging in the web configuration page, choose SETUP > Internet
Setup > Channel Config, The page is shown as the figure appears on
the right. In this page, choose the WAN Physical Type according to the
Internet service provided by your ISP. There are 2 types of WAN
connection: ADSL WAN and Ethernet WAN.

Section 3 – Web Configuration
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SETUP
•For users of ADSL Connection.
If the Internet service provided by your ISP is in ADSL uplink mode, in SETUP >
Internet Setup > Channel Config page, choose ADSL WAN.
Wizard-ADSL WAN
Wizard enables fast and accurate configuration of Internet connection and other important parameters. The following sections describe these various
configuration parameters.
When subscribing to a broadband service, you should be aware of the method, by which you are connected to the Internet. The connection type of
your physical WAN device can be Ethernet, DSL, or both. Technical information about the properties of your Internet connection is provided by your
Internet service provider (ISP). For example, your ISP should inform you whether you are connected to the Internet using a static or dynamic IP
address, or the protocol, such as PPPoAor PPPoE, that you use to communicate over the Internet.
Choose SETUP > Wizard. The page is shown as the figure appears on the right.

Section 3 – Web Configuration
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Step 1 Click Setup Wizard. The page is shown as the figure appears on the
right. There are 5 steps to configure the device. Click Next to continue.
Step 2 Change the Login password (The default Login password is admin.),
and then click Next.
Step 3 If you do not change the Login password, click Skip to go to the next
page.
Step 4 Set the system time and mode, and then click Next.
Step 5 In this page, you can set the WAN interface.
Step 6 There are types of Protocols to connect to internet in the drop-down
list of protocol
. According to your subscribed service from your ISP,
select the protocols.

Section 3 – Web Configuration
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-PPPoE/PPPoA
If the protocol is set to PPPoE or PPPoA, the page shown as the right figure
appears.
You can set the parameters in this page as follow:
1) Set the country that you are locating.
2) Choose the ISP (Internet Service Provider) where
you subscribed the
internet service.
3) Set the protocol to PPPoE or PPPoA.
4) Choose the connection type provided by your ISP from the Connection
Type drop-down list.
5) Enter the VPI and VCI provided by your ISP.
6) Enter the Username and Password provided by your ISP.
7) Re-enter the password for confirmation.