D-Link DSL-3785 Operating and maintenance instructions

AC1200 MU-MIMO WIRELESS
VDSL/ADSL2+ MODEM ROUTER
DSL-3785
QUICK
INSTALLATION
GUIDE

DSL-3785 1
IMPORTANT
INFORMATION
IMPORTANT INFORMATION REGARDING YOUR
INTERNET SUBSCRIPTION
USERS WHO SUBSCRIBE TO LIMITED OR “PAY AS YOU USE” BROADBAND INTERNET
ACCESS.
In the WAN conguration settings, there is a parameter called Maximum idle timer. This parameter controls how
many seconds of inactivity before dropping connection to the Internet. The default setting is “0” which disables this
functionality and the Internet will be connected all the time. We suggest that you should change the Maximum idle
timer to “300” (5 minutes) so that the device will drop the line after 5 minutes of inactivity and keep usage costs down.
USERS WHO SUBSCRIBE TO UNLIMITED BROADBAND INTERNET ACCESS.
You can just leave this parameter unchanged or enable Auto-reconnect to be always online.
TECHNICAL NOTES:
The Maximum idle timer is only relevant if your ISP is using PPPoE connection.
EN
!

DSL-3785
2
ENGLISH
CONTENTS OF
PACKAGING
CONTENTS
POWER ADAPTER
12 V 1.5 A
ETHERNET CABLE
CONNECT THE ROUTER TO YOUR PC DURING SET-UP
If any of these items are missing from your packaging contact
your reseller
RJ-11 PHONE CABLE
CONNECT THE ROUTER TO YOUR WALL PHONE JACK
AC1200 MU-MIMO WIRELESS VDSL/ADSL2+
MODEM ROUTER
DSL-3785

DSL-3785 3
ENGLISH
PRODUCT SETUP
Step 1
Position your DSL-3785 near your PC and a telephone wall jack
which provides DSL service. Keep the modem router in an open
area for better wireless coverage.
PC
DSL-3785 Phone
Step 2
Plug one end of the supplied DSL phone cable into the DSL port on
the back of the modem router, and the other end into the telephone
wall jack.
PC
DSL-3785 Phone
HARDWARE SETUP
Step 3
Connect the supplied power adapter to the modem router and a
power outlet, and press the power button. The device LEDs will light
up. Wait approximately one minute before going on to step 4.
DSL-3785Power
PC
Step 4
Plug one end of the supplied Ethernet cable into the port labeled
1 on the back of the modem router, and the other end into the
Ethernet port on your computer.
If you are setting up the DSL-3785 using a laptop or mobile
device, connect it using the Wi-Fi network name and password
printed on the label attached to the back your router.
DSL-3785Power
PC
SYSTEM REQUIREMENTS
• ADSL/VDSL Internet service
• Computer with:
• Microsoft Windows® 10/8/7/Vista/XP SP3 or Mac with OS X 10.7 or higher
• Internet Explorer 8, Edge 25, Firefox 20, Safari 4, or Chrome 17 or higher version with Java
installed and enabled
PC

DSL-3785
4
ENGLISH
To configure your DSL-3785, open a browser on the connected
computer. Go to "192.168.1.1" or "http://dlinkrouter.local./" and follow
the onscreen instructions. If prompted, log in using the username
and password printed on the label attached to the back your router.
Log In
Admin Password:
CONFIGURE USING THE BUILT-IN WEB INTERFACE
SETUP USING THE BUILT-IN WEB INTERFACE
1. HOW DO I RESET MY DSL-3785 ROUTER TO THE FACTORY DEFAULT
SETTINGS?
- Ensure the router is powered on.
- Use an unfolded paperclip to press and hold the reset button on the back of the device for more
than 5 seconds until all the front LEDs turn on. The router will reset to the factory defaults and
begin rebooting.
Note: Resetting the router to the factory defaults will erase the current conguration settings.
To recongure your settings, log in to the router as outlined in question 1, then run the Setup Wizard.
2. HOW DO I ADD A NEW WIRELESS CLIENT OR PC IF I HAVE FORGOTTEN MY
WI-FI NAME (SSID) OR WI-FI PASSWORD?
- Use the web-based user interface (as described in question 1 above) to check or choose your
wireless settings.
- Make sure you write down these settings so that you can enter them for each wirelessly
connected PC. The back of this document features an area to record this important information.
- If your device supports WPS, you may press the WPS button on the side of the router for
approximately 5 seconds to begin the WPS pairing process. Refer to your wireless device's
documentation for information on how to pair a device to your DSL-3785 using WPS.
3. WHY CAN'T I GET AN INTERNET CONNECTION USING DSL?
- If you are replacing a DSL modem or combination DSL modem router, make sure to completely
disconnect and power o󰀨 your existing equipment. Connect your DSL-3785 to the wall jack
which worked with your previous DSL modem.
- Verify that the BROADBAND LED is lit solid green. If it isn't, please contact your ISP to make
sure the service has been enabled/connected by your ISP.
- If the BROADBAND LED is lit solid green, but the INTERNET LED is lit solid red or o󰀨, or you
are having trouble with the Setup Wizard, make sure that the username and password provided
by your ISP are correct.
- If you are still having trouble, you may need to contact your ISP for additional Bring Your Own
Device (BYOD) conguration steps. Refer to the product manual, available at www.dlink.com/
support for additional conguration help.
TROUBLESHOOTING
CONFIGURATION
TECHNICAL SUPPORT dlink.com/support

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