Quick Installation Guide
ADSL/Ethernet Router

Quick Installation Guide
Delivery Package

Router DSL-2500U

Power adapter

RJ-11 telephone cable

Straight-through Ethernet cable (CAT 5E)


CD-ROM with “User Manual” and “Quick Installation Guide

Quick Installation Guide” (brochure)
If any of the items are missing, please contact your reseller.
! Using a power supply with a different voltage rating than the one
included will cause damage and void the warranty for this product.
Default Settings
IP address of router
Username (login)
System Requirements and Equipment

A computer with any operating system that supports a web browser.

A web browser to access the web-based interface of the router: Windows
Internet Explorer, Mozilla Firefox, or Opera.

A NIC (Ethernet adapter) to connect to the router.

Quick Installation Guide
1. Make sure that your PC is powered off.
2. Connect an Ethernet cable between the Ethernet port located on the back
panel of the router and the Ethernet port of your PC.
3. Connect a phone cable between the DSL port of the router and the ADSL
OUT port of the splitter. Connect your phone to the PHONE port of the
splitter. Then connect another phone cable between a phone jack and the
ADSL IN port of the splitter.
4. Connect the power cord to the power connector port on the back panel of
the router, then plug the power adapter into an electrical outlet or power
5. Turn on your PC and wait until your operating system is completely
Now you should configure your PC to obtain an IP address automatically (as
DHCP client).
1. Click the Start button and proceed to the Control Panel > Network
and Internet Connections > Network Connections window.
2. In the Network Connections window, right-click the relevant Local
Area Connection icon and select the Properties line in the menu

Quick Installation Guide
3. In the Local Area Connection Properties window, on the General
tab, in the This connection uses the following items section, select
the Internet Protocol (TCP/IP) line. Click the Properties button.
4. Select the Obtain an IP address automatically radio button. Click
the OK button.
Click the ОК button. Now your computer is configured to obtain an IP address

Quick Installation Guide
Connecting to Web-based Interface
1. Start a web browser.
2. In the address bar of the web browser, enter the IP address of the router
(by default, the following IP address is specified: Press
the Enter key.
3. On the opened page, enter the username (login) and password for the
administrator account (by default, the following username and password
are specified: admin, admin). Then click the Enter button.
f the error “ T
he page cannot be displayed ” (or “ U
nable to display the
! page

/“ C
ould not connect to remote server ) occurs upon connecting to
the web-based interface of the router, make sure that you have properly
connected the router to your computer.
After successful registration the system statistics page opens. The page
displays general information on the router and its software.
! It is strongly recommended to change the administrator password upon
nitial configuration of the router. To do this, go to the S
ystem /
dministrator password pa

Quick Installation Guide
The web-based interface of the router is bilingual (English/Russian). Select a
needed language from the menu displayed when the mouse pointer is over the
Language caption. You can change the language of the web-based interface
in any menu item.
Configuring Connection to the Internet
You should configure your WAN connection in accordance with data
! p rovided by your I nternet service provider (ISP). Make sure that you
have obtained all necessary information prior to configuring your WAN
connection. Otherwise contact your ISP.
1. Go to the Net / Connections page and click the Add button.
2. In the General settings section, specify a name for your connection
(any name for easier identification) in the Name field and select a type
for your connection from the Connection Type drop-down list.

Quick Installation Guide
3. In the Physical layer section, specify the VPI and VCI in the relevant
fields, and then select a method of encapsulation from the
Encapsulation Mode drop-down list.
4. For the IPoA and IPoE connection types, fill in the IP Address,
Netmask, and Gateway IP Address fields in the IP settings section.
For the IPoE type, you can specify automatic assignment of these
parameters (to do this, select the Obtain an IP address

Quick Installation Guide
5. For the PPPoE and PPPoA connection types, enter authorization data
provided by your ISP in the PPP Settings section (the username (login)
in the PPP Username field and the password in the Password and
Password confirmation fields). If these data have not been provided
by your ISP, select the Without authorization checkbox.
6. Deselect the NAT checkbox in the Miscellaneous section if your ISP
requires you to disable the network address translation function.
7. Click the Save button.

Quick Installation Guide
Configuring Local Area Network
1. Go to the Net / Connections page and select the LAN connection. If
needed, change the IP address and subnet mask for the LAN interface of
the router in the IP Address and Netmask fields of the IP settings
section. Then click the Save button.
2. By default, the DHCP server of the router is enabled. On the DHCP
server tab you can change the parameters of the DHCP server. If you
want to manually assign IP addresses to devices of your LAN, disable the
DHCP server (select the Disable value from the Mode drop-down list).
3. After specifying the DHCP server settings, click the Save button.

Quick Installation Guide
Changing Administrator Password
It is highly recommended to change the administrator password used to access
the web-based interface of the router upon initial configuration. This helps you
to improve your network security.
1. Go to the System / Administrator password page.
2. Enter a new password for the administrator account in the Password
and Confirmation fields.
3. Click the Save button.
Remember or write down the new password for the administrator
! account. In case of losing the new password, you can access the settings
of the router only after restoring the factory default settings via the
hardware Reset button. This procedure wipes out all settings that you
have configured for your router.
Saving Settings to Non-volatile Memory
In order to avoid losing the new settings upon hardware reboot (accidental or
intentional power-off of the device), it is recommended to save the settings to
the non-volatile memory of the router.
Click the Save&Reboot line in the top-page menu displayed when the mouse
pointer is over the System caption.
Wait until the router is rebooted. Now you can use it to access the Internet or
access the web-based interface of the router to configure additional parameters
(for detailed description of every page of the web-based interface, see the
User Manual” document).

Quick Installation Guide
You can find software updates and user documentation on our website.
D-Link provides its customers with free support within the product's warranty
Customers can contact the technical support group by phone or by e-

Document Outline