NETGEAR EX3920 User manual

Quick Start
AC750 WiFi Range Extenders
Model EX3920

2
Getting Started
The NETGEAR WiFi Range Extenders increase the distance of a WiFi
network by boosting the existing WiFi signal and enhancing the overall
signal quality over long distances. An extender repeats the signals from an
existing WiFi router or access point.
Note: Each extender must connect to your router’s WiFi network. Do not
connect the extenders to another extender’s WiFi network.
WiFi Range Extenders
Boost the range of your
existing WiFi and create
a stronger signal in
hard‑to‑reach areas
Existing WiFi
Sometimes your router
does not provide the
WiFi coverage that you
need

3
Meet Your Extenders
Before you install your extenders, familiarize yourself with their
LEDs, buttons, and ports.
Front Panel
Router
Link LED
Device
Link LED
Power LED
WPS LED

4
Side Panels
Factory
Reset
button
WPS button
Power On/O
button
Ethernet port
Power connector
(varies by region)
Power connector
(varies by region)

5
LED Descriptions
Router Link LED This LED indicates the connection between the extender and
the router or access point.
Solid green. Best connection.
Solid amber. Good connection.
Solid red. Poor connection.
O. No connection.
Device Link LED
This LED indicates the connection between the extender and
a computer or WiFi device.
Solid green. Best connection.
Solid amber. Good connection.
Solid red. Poor connection.
O. No connection.
Power LED Solid amber. The extender is booting.
Solid green. The extender is powered on.
O. The extender is powered o.
WPS LED Solid green. WiFi security is enabled (WPA or WPA2).
Blinking green. A WPS connection is being established.
O. WiFi security is not enabled.
Note: If the Router Link LED or Device Link LED lights amber or red, see
Find the Best Location on page 11.

6
Use the Extenders in Extender Mode
Place the extenders, apply power, and connect them to your router’s WiFi
network.
Place the Extenders and Apply Power
1. Place an extender in the same room as your WiFi router.
Proximity to the WiFi router is required only during the initial setup
process.
2. Plug the extender into an electrical outlet.
Wait for the Power LED to light green. If the Power LED does not light,
press the Power On/Off button on the extender.
3. Repeat Steps 1–2 for the second extender.

7
Connect to an Existing WiFi Network
To extend the range of your WiFi network, you must connect the
extenders to your existing router’s WiFi network. You can do this in one of
two ways:
• Connect with WPS. For more information, see Connect with WPS on
page 7.
• Connect with web browser setup. For more information, see
Connect with Web Browser Setup on page 9.
Note: Each extender must connect to your router’s WiFi network. Do not
connect the extenders to another extender’s WiFi network.
Connect with WPS
Wi‑Fi Protected Setup (WPS) lets you join a secure WiFi network without
typing the network name and password.
Note: WPS does not support WEP network security. If you are using WEP
security, follow the instructions in Connect with Web Browser Setup on
page 9.
1. Press the WPS button on the side panel of the extender.
The WPS LED blinks.

8
2. Within two minutes, press the WPS button on your router.
The WPS LED on the extender lights solid green, the Router Link LED
lights, and the extender connects to your existing WiFi network.
If the Router Link LED does not light, try again. If it still does not light,
see Connect with Web Browser Setup on page 9.
3. If your WiFi router supports the 5 GHz band, repeat Steps 1 and 2 to
connect the extender to the 5 GHz band.
4. Find the new extended WiFi network name on your computer or WiFi
device.
The extender creates two new extended WiFi networks. The
extender’s new WiFi network names are based on your existing WiFi
network name, with _2GEXT and _5GEXT at the end of the name.
For example:
• Existing WiFi network name. MyNetworkName
• New extended WiFi network names. MyNetworkName_2GEXT
and MyNetworkName_5GEXT
5. Connect your computer or WiFi device to the new extended WiFi
network.
Use the same WiFi password that you use for your WiFi router.
6. Unplug the extender and move it to a new location closer to the area
with a poor WiFi signal.

9
The location that you choose must be within the range of your
existing router’s WiFi network.
7. Plug the extender into an electrical outlet.
Wait for the Power LED to light green. If the Power LED does not light,
press the Power On/Off button on the extender.
8. Use the Router Link LED on the front panel to help you choose a spot
where the extender‑to‑router connection is optimal.
9. Repeat Steps 1–8 to connect the second extender.
Connect with Web Browser Setup
1. Use a WiFi network manager on a computer or WiFi device to find and
connect to the NETGEAR_EXT (SSID) WiFi network.
After the connection with the computer or WiFi device is established,
the Device Link LED lights.
2. Launch a web browser.
3. Enter www.mywifiext.net in the address field of the browser.
The New Extender Setup screen displays.
4. Click the NEW EXTENDER SETUP button.
The Extender Setup screen displays.
5. Complete the fields on the Extender Setup screen and click the NEXT
button.

10
6. Click the WIFI RANGE EXTENDER button.
The extender searches for WiFi networks in your area and displays a
list.
7. Select a WiFi network to extend and click the NEXT button.
If you do not want to extend both WiFi bands, clear the 2.4GHz WiFi
Networks or the 5GHz WiFi Networks check box.
Note: If you already installed an extender, do not select the
extender’s WiFi network.
8. In the Password (network key) field, type the existing WiFi network
password (also called passphrase or security key) and click the NEXT
button.
9. Set the network name (SSID) and password for your extender and
click the NEXT button.
10. Use a WiFi network manager on the computer or WiFi device to
connect to the new extended WiFi network.
Repeat this step for all of your computers and WiFi devices.
11. Click the Continue button.
A message displays confirming that the extender is connected to the
new extended WiFi network.
12. Click the Next button.
The Status screen displays.

11
13. Unplug the extender and move it to a new location closer to the area
with a poor WiFi signal.
The location that you choose must be within the range of your
existing WiFi router network.
14. Plug the extender into an electrical outlet.
Wait for the Power LED to light green. If the Power LED does not light,
press the Power On/Off button on the extender.
Use the Router Link LED to help you choose a spot where the
extender‑to‑router connection is optimal.
15. Repeat Steps 1–14 to connect the second extender.
Find the Best Location
If the WiFi signal is weak, the first time you join the extender network, the
Router Link LED or Device Link LED lights amber or red. If this happens,
adjust the position of the extender:
• If the Router Link LED lights amber or red, move the extender closer
to the router.
• If the Device Link LED lights amber or red, move the computer or WiFi
device closer to the extender.

12
Use the Extenders in Access Point Mode
You can use the extenders as WiFi access points, which creates new WiFi
hotspots using a wired Ethernet connection.
1. Plug an extender into an electrical outlet.
Wait for the Power LED to light green. If the Power LED does not light,
press the Power On/Off button.
2. Use an Ethernet cable to connect the Ethernet port on the extender
to a router Ethernet LAN port or a remote Ethernet LAN jack with LAN
access.
The extender joins the LAN and creates a WiFi hotspot.

13
3. Use a WiFi network manager on a computer or WiFi device to find and
connect to the NETGEAR_EXT (SSID) WiFi network.
After the connection with the computer or WiFi device is established,
the Device Link LED lights.
4. Launch a web browser and enter www.mywifiext.net in the address
field.
The New Extender Setup screen displays.
5. Click the NEW EXTENDER SETUP button.
The Extender Setup screen displays.
6. Complete the fields on the Extender Setup screen and click the NEXT
button.
7. Click the ACCESS POINT button.
The extender checks for an Internet connection.
8. Set the network name (SSID), security option, and password for each
access point network, and click the NEXT button.
Your settings are applied and the extender is ready to be used as an
access point.
9. Use a WiFi network manager on the computer or WiFi device to
connect to the new access point WiFi network.
10. Repeat Steps 1–9 to install the second extender.

14
Connect an Ethernet-Enabled Device
After the extenders are connected to your existing WiFi network, you
can connect wired devices to the extenders using an Ethernet cable. That
device can then access your existing network through the WiFi connection.
Log In to Access Extender Settings
After installation, you can log in to the extenders to view or change their
settings.
1. Use a WiFi network manager on a computer or WiFi device to find and
connect to one of the new extended WiFi networks.
After the connection with the computer or WiFi device is established,
the Device Link LED lights.
2. Launch a web browser.
Extender
Blu-ray player
WiFi router

15
3. Enter www.mywifiext.net in the address field of the browser.
A login screen displays.
4. Type your email address and password and click the LOG IN button.
The Status screen displays.
5. Make any needed changes.
Frequently Asked Questions
You can find more information about your extenders in the user manual,
which is available at http://downloadcenter.netgear.com.
The web browser setup guide keeps asking me for my network
password (passphrase) or security key, and I am sure that I entered
the correct password. What can I do?
The extender is probably placed at the borderline of the range covered by
the router or access point. For more information, see Place the Extenders
and Apply Power on page 6.
If you are using WEP security, make sure that you are typing the network
password in the correct field.

16
Can I connect the extender to another extender’s WiFi network?
NETGEAR recommends that you do not connect an extender to another
extender’s WiFi network. For the best WiFi performance and network
configuration, connect all extenders to a router.
Can I set up the extenders in extender mode if I connect them to
the router or access point with an Ethernet cable?
No. The extenders are designed to connect wirelessly to the router or
access point if they are in extender mode. If the extenders are in access
point mode, you can connect them to the router or access point with an
Ethernet connection. For more information about access point mode, see
Use the Extenders in Access Point Mode on page 12.
I am connected to NETGEAR_EXT and launched a browser. Why
can’t I see the web browser setup guide?
Try these troubleshooting steps:
• Make sure that your computer is set up to use DHCP (most are).
• Make sure that the Device Link LED is green and that you are using a
valid IP address.
• Relaunch the web browser and type www.mywifiext.net in the
address field. Type your email address and password and click the
LOG IN button.

17
How do I restore the extender to its factory default settings?
1. Use a sharp object such as a pen or paper clip to press and hold the
Factory Reset button on the extender for at least five seconds until
the Power LED lights amber.
2. Release the Factory Reset button and wait for the extender to
reboot.
The extender resets and returns to the factory default settings.
I forgot my login email address and password. What can I do?
On the login screen, click the Username & Password Help link to answer
the security questions that you set up during the initial setup.
If you forgot the answers to your security questions, do the following to
set up your login credentials again:
1. Restore the extender to its factory default settings.
2. Launch a web browser.
3. Enter www.mywifiext.net in the address field of the browser.
The New Extender Setup screen displays.
4. Click the NEW EXTENDER SETUP button.
The Extender Setup screen displays.
5. Complete the fields on the Extender Setup screen.

18
I enabled a wireless MAC filter, wireless access control, or access
control list (ACL) on my router. What should I do when installing
the extenders?
When the WiFi device connects through the extenders to your router,
the MAC address of the WiFi device shown on the router is translated to
another MAC address. If your router’s MAC filter, wireless access control,
or ACL is enabled, the WiFi device connects to the extenders but cannot
get an IP address from the extender and cannot access the Internet.
To allow the WiFi device to receive an IP address from the extenders and
access the Internet, you must provide the translated MAC address to the
router.
1. Log in to your router and disable the MAC filter, wireless access
control, or ACL.
For more information about how to disable your router’s MAC filter,
wireless access control, or ACL, see your router’s documentation.
2. Power on the extender and connect all of your WiFi devices to the
extender network.
3. Make sure that the Router Link LED remains lit.
4. Log in to your extender:
a. Launch a web browser.
b. Enter www.mywifiext.net in the address field of the browser.
A login screen displays.

19
c. Type your email address and password and click the LOG IN
button.
The Status screen displays.
5. Select Settings > WiFi Settings.
6. Scroll down and select Connected Devices.
The Connected Devices section displays the MAC addresses and
virtual MAC addresses for computers and WiFi devices that are
connected to the extender network.
7. Repeat Steps 4–6 for the second extender.
8. On the router, add all of the virtual MAC addresses from your
extender to your router’s MAC filter table.
9. Enable the router’s MAC filter, wireless access control, or ACL.

March 2015
NETGEAR, Inc.
350 East Plumeria Drive
San Jose, CA 95134, USA
Support
Thank you for purchasing this NETGEAR product. After installing your device, locate the
serial number on the label of your product and use it to register your product at
https://my.netgear.com. You must register your product before you can use NETGEAR
telephone support. NETGEAR recommends registering your product through the
NETGEAR website.
For product updates and web support, visit http://support.netgear.com.
NETGEAR recommends that you use only the official NETGEAR support resources. You
can get the user manual online at http://downloadcenter.netgear.com or through a link
in the product’s user interface.
Trademarks
© NETGEAR, Inc., NETGEAR and the NETGEAR Logo are trademarks of NETGEAR, Inc.
Any non‑NETGEAR trademarks are used for reference purposes only.
Compliance
For the current EU Declaration of Conformity, visit
http://support.netgear.com/app/answers/detail/a_id/11621/.
For regulatory compliance information, visit
http://www.netgear.com/about/regulatory/.
See the regulatory compliance document before connecting the power supply.