D-Link DVG-5121SP User manual

Before You Begin
You must have the following basic equipment and services:
‧A subscription with an Internet Service Provider (ISP)
‧A Computer running Windows, with a CD-ROM drive and an Ethernet port
‧An Ethernet-based broadband modem
‧A standard analog telephone
Check Your Package Contents
If any of the items below are missing, please contact your reseller.
These are the items included with your DVG-5121SP purchase:
©2006 D-Link Corporation. All rights reserved. Trademarks or registered trademarks are the property of their respective
holders. Software and specifications subject to change without notice.
DVG-5121SP VoIP Telephone Adapter
This product can be set up
using Internet Explorer 6.x or
above, with Java script enabled
DVG-5121SP
VoIP Telephone Adapter
CD-ROM (containing User Manual)
CAT5 Ethernet Cable
RJ-11 Cable
AC Power Adapter
Using a power supply
with a different voltage rating
will damage and void the
warranty for this product.

2
Hardware Overview
Front Panel
WAN LED When a connection is established, the LED will light
up. The LED will blink to indicate activity. If the LED
does not light up when a cable is connected, verify all
cable connections and make sure all devices are
powered on.
LAN LED When a connection is established, the LED will light
up. The LED will blink to indicate activity. If the LED
does not light up when a cable is connected, verify the
cable connections and make sure your devices are
powered on.
Power LED Indicates the unit is powered on.
Provision LED The Provision LED will flash when the device
accesses the ACS and will be off once the
provisioning process is complete.
Phone LEDs
(1-2)
These two LEDs display the VoIP status and Hook
activity on the phone ports that are used to connect
normal telephones. If a phone connected to a phone
port is off hook or in use, this LED will light up. When
a phone is ringing, the indicator will blink rapidly.

3
Hardware Overview (continued)
Right Side and Rear Panels
Right Side Panel
WAN Port Connects to your DSL or Cable modem using an
Ethernet cable.
LAN Port Connects to an Ethernet enabled computer or IP
sharing device using an Ethernet cable.
Rear Panel
Reset This button is used to reset the unit to its factory
default settings.
RJ-11 Phone
Ports (1~2)
Connect one or two analog phones using RJ-11
cable (one cable is included with the DVG-5121SP).
RJ-11 Line
Port
<for PSTN>
Connects the DVG-5121SP to a phone wall-jack
using an ordinary RJ-11 phone cable.
AC Input The power adapter connects here.
Connecting the DVG-5121SP directly
to a Modem, phone and Computer
If your computer connects directly to a DSL or Cable modem and does not connect to
a router, follow the steps below to install your DVG-5121SP. For any other
configuration, please refer to the user manual located on the CD-ROM included with
the device. After the steps are completed, your setup should look similar to the
diagram below.

4
Connecting the DVG-5121SP directly
to a Modem, phone and Computer
(continued)
a. Turn off your Computer.
b. Disconnect the power to your Cable or DSL Modem (unplug it or turn off the power
switch).
c. Unplug the Ethernet cable that is connected to your Cable or DSL Modem’s LAN
or Ethernet port. Leave the other end of this cable connected to your PC.
d. Plug the Ethernet cable that you just removed from
the modem into the LAN port on the right side of the
DVG-5121SP.
The other end remains connected to the PC.
e. Connect one end of the Ethernet Cable provided in this package to the LAN or
Ethernet Port on the Cable or DSL Modem.
f. Connect the other end of the provided Ethernet Cable
to the WAN Port on the side of the DVG-5121SP.

5
zIf your ISP registers your computer’s MAC address, see the section labeled MAC
Cloning under Connections in the user manual on the CD-ROM.
zPPPoE Users, please continue to the next page for additional configuration steps.
Connecting the DVG-5121SP directly
to a Modem, phone and Computer
(continued)
g. Connect one end of the provided RJ-11 phone cable into a standard analog
telephone.
h. Connect the other end of the RJ-11 cable to either
of the two phone ports on the rear panel of the
DVG-5121SP. (Note: you may connect one phone
to each of the phone ports, allowing a maximum of
two phones to be connected simultaneously.)
i. Next, connect one end of an ordinary RJ-11 phone
cable into the Line port on the rear panel of the
DVG-5121SP.
j. The other end of the cable should then be plugged into a active analog phone
wall-jack. This connection provides a backup connection in case of an interruption
in IP telephone service
k. Restore power to the Cable or DSL Modem (plug it
in or turn on the power switch).
l. Power on the DVG-5121SP
m. Restart your PC.
Hardware configuration is complete! If your VoIP service is already activated, you can make
phone calls now.

6
PPPoE Configuration
Some Internet Service Providers use PPPoE as their method of connecting clients. If
you have a PPPoE connection, you must follow the steps below to complete the
configuration of your hardware. If you are unsure of your connection type or do not
know your username and password, please check with your Internet Service Provider.
Open your web browser and enter
the URL http://192.168.1.1 in the
address bar and press Enter.
Enter “admin” as the
username and click Login
to enter the device’s Web
GUI. No password
needed.

7
PPPoE Configuration (continued)
Click Basic Network
Settings and then WAN.
Click the PPPoE radio
button. Enter PPPoE
Username, Password
and Ret
yp
e Password.
Click Submit at the
bottom of the page.
The system will restart after
you click Submit.
After restarting, the Web GUI
will return to the login page,
and the PPPoE settings you
entered will be displayed
after you login.

8
PPPoE Configuration (continued)
Once the unit reboots, your operating system (e.g., Windows XP) will display a status
change – first disconnect then successful reconnect – in the local network connection.
Check to see if the status LED on the front panel of the DVG-5121SP changes from
blinking green to steady green.
NOTE: The information displayed under Device Info in the Web GUI is necessary for
VoIP service registration. At minimum, you will need to know your: IP address, MAC
address, Subnet address, Gateway default address, and DNS settings.
VoIP Configuration
Click SIP Setting
and then Account
Setting you login.
To enable, chose a phone,
then enter the Phone
Number, Display Name,
Username, Password and
Confirmed Password.

9
VoIP Configuration (continued)
After restarting, the DVG-5121SP will automatically connect with the SIP VoIP service
to which the entered user account is subscribed. Look at the Phone LED or listen for a
dial tone by taking the phone off the hook to check if VoIP phone service has been
successfully initiated.
After correctly entering the VoIP settings, users can use SIP VoIP phone service
without any further need for changing or adjusting the settings to make IP phone calls.
Enter a Registrar
Server Address
Click the Submit button to
save settings; the system
will restart and then
authenticate SIP VoIP

10
Technical Support
You can find software updates and user documentation on the D-Link websites.
If you require product support, we encourage you to browse our FAQ section on
the Web Site before contacting the Support line. We have many FAQ’s which
we hope will provide you a speedy resolution for your problem.
For Customers within
The United Kingdom & Ireland:
D-Link UK & Ireland Technical Support over the Internet:
http://www.dlink.co.uk
ftp://ftp.dlink.co.uk
D-Link UK & Ireland Technical Support over the Telephone:
08456 12 0003 (United Kingdom)
[phone] (Ireland)
Lines Open
8.00am-10.00pm Mon-Fri
10.00am-7.00pm Sat & Sun
For Customers within Canada:
D-Link Canada Technical Support over the Telephone:
1-800-361-5265 (Canada)
Mon. to Fri. 7:30AM to 9:00PM EST
D-Link Canada Technical Support over the Internet:
http://support.dlink.ca
email: [email protected]