Asus DSL-N55U User manual

DSL-N55U
Dual-band Wi-Fi ADSL Modem Router
The ultra-thin and stylish
DSL-N55U features a 2.4GHz
and 5GHz dual bands for an
unmatched concurrent wireless
HD streaming; SMB server, UPnP
AV server, and FTP server for 24/7
file sharing; a capability to handle
300,000 sessions; and the ASUS
Green Network Technology, which
provides up to 70% power-saving
solution.
User Guide

2
Copyright © 2011 ASUSTeK Computer Inc. All Rights Reserved.
No part of this manual, including the products and software described
in it, may be reproduced, transmitted, transcribed, stored in a retrieval
system, or translated into any language in any form or by any means, except
documentation kept by the purchaser for backup purposes, without the express
written permission of ASUSTeK Computer Inc. (“ASUS”).
Product warranty or service will not be extended if: (1) the product is repaired,
modified or altered, unless such repair, modification of alteration is authorized
in writing by ASUS; or (2) the serial number of the product is defaced or missing.
ASUS PROVIDES THIS MANUAL “AS IS”WITHOUT WARRANTY OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
WARRANTIES OR CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS DIRECTORS, OFFICERS,
EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL,
OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS,
LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS
AND THE LIKE), EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL OR
PRODUCT.
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE
FURNISHED FOR INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE
AT ANY TIME WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A
COMMITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBILITY OR LIABILITY
FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS MANUAL,
INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.
Products and corporate names appearing in this manual may or may not be
registered trademarks or copyrights of their respective companies, and are used
only for identification or explanation and to the owners’benefit, without intent
to infringe.
E6895
First Edition
November 2011

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Table of contents
1 A quick look
Package contents ........................................................................................ 5
Your ADSL router ......................................................................................... 5
Mounting options ....................................................................................... 7
2 Creating your network
Positioning your router ............................................................................. 8
What you need ............................................................................................. 9
Connecting your devices........................................................................10
Wired connection...............................................................................10
Before you proceed...................................................................................11
Disable the proxy server, if enabled.............................................11
Set the TCP/IP settings to automatically
obtain an IP address.................................................................13
Disable the dial-up connection, if enabled................................14
Setting up your ADSL router..........................................................15
3 ConguringviathewebGUI
Logging into the web GUI ......................................................................19
Using Wi-Fi Protected Setup (WPS)..............................................21
Setting up the wireless security settings ..........................................23
Managing your network clients ...........................................................25
Monitoring your USB device..................................................................26
Using AiDisk for an FTP Server and Network
Neighborhood setup ........................................................................28
Using your router as a UPnP Media Server.......................................30
Managing EZQoS Bandwidth................................................................31
Setting up the bandwidth priority...............................................31
Monitoring the network traffic......................................................33
Configuring the Advanced settings....................................................34
Setting up the DHCP Server ...........................................................34

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Table of contents
Upgrading the firmware..................................................................36
Restoring/Saving/Uploading settings ........................................37
Sharing files from a USB storage device.....................................38
Setting up your network printer ..........................................................41
4 Usingtheutilities
Device Discovery .......................................................................................45
Firmware Restoration...............................................................................46
ADSL Setting Wizard.................................................................................47
5 Troubleshooting
Troubleshooting ........................................................................................51
ASUS DDNS Service ..................................................................................54
Frequently Asked Questions (FAQs) ............................................54
Appendices
Notices...........................................................................................................56
ASUS Contact information .....................................................................66
Networks Global Hotline Information................................................67

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1 A quick look
Package contents
DSL-N55U Warranty card
Network cable Quick Start Guide
AC adapter Support CD (User Manual/utilities)
Phone cable Splitter (varies with regions)
Your ADSL router
NOTES:
• If any of the items is damaged or missing, contact ASUS for
technical inquiries and support, Refer to the ASUS Support
Hotline list at the back of this user manual.
• Keep the original packaging material in case you would need
future warranty services such as repair or replacement.
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1
3
4
5
6
8
7
9
10
11 12 13

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1Power LED
Off: No power.
On: Device is ready.
Flashing slow: Rescue mode
Flashing quick: WPS is processing.
2ADSL LED
Solid light: ADSL link is established.
Flashing: No ADSL link or unable to establish ADSL link.
3WAN LED
Off: No power or no physical connection.
On: Has physical connection to a wide area network (WAN).
4LAN LED
Off: No power or no physical connection.
On: Has physical connection to a local area network (LAN).
52.4GHz LED & 5GHz LEDs
Off: No 2.4GHz or 5GHz signal.
On: Wireless system is ready.
Flashing: Transmitting or receiving data via wireless connection.
6ADSL port
Connect to a splitter or to a telephone outlet via an RJ-11 cable.
7Power (DC-In) port
Insert the bundled AC adapter into this port and connect your router to a
power source.
8Power switch
Press this button to turn the power on/off.
9Wi-Fi switch
Switch to turn the WiFi feature on/off.
10 USB 2.0 / USB 1.1 ports
Insert USB 2.0/USB 1.1 devices such as USB hard disks or USB flash drives into
these ports.
Insert your iPad’s USB cable into one of these ports to charge your iPad.
Insert your printer’s USB cable into one of these ports to set up your network
printer. For details, refer to the section Setting up your network printer.
11 WPS button
This button launches the WPS Push Button Configuration process.
12 LAN 1 ~ 4 ports
Connect network cables into these ports to establish LAN connection.
13 Reset button
This button resets or restores the system to its factory default settings.

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NOTES:
• Use only the adapter that came with your package. Using
other adapters may damage the device.
• Specifications:
DC Power adapter DC Input: +19V with max 1.58A current
Operating
Temperature
0~40oCStorage 0~70oC
Operating Humidity 50~90% Storage 20~90%
Mounting options
Out of the box, the ASUS ADSL router is designed to sit on a raised
flat surface like a file cabinet or book shelf.The unit may also be
converted for mounting to a wall or ceiling.
To mount the ASUS ADSL router:
1. Look on the underside for
the two mounting hooks.
2. Mark two upper holes in a
flat surface.
3.Tighten two ST3.5*40
screws until only 1/4’’ is
showing.
4. Latch the hooks of your
ADSL router onto the
ST3.5*40 screws.
NOTE: Re-adjust the ST3.5*40 screws if you cannot latch DSL-
N55U onto the ST3.5*40 screws or if it is too loose.

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2 Creating your network
Positioning your router
For the best wireless signal transmission between the ADSL router
and the network devices connected to it, ensure that you:
• Place the ADSL router in a centralized area for a maximum
wireless coverage for the network devices.
• Keep the device away from metal obstructions and away from
direct sunlight.
• Keep the device away from 802.11g or 20MHz only Wi-Fi
devices, 2.4GHz computer peripherals, Bluetooth devices,
cordless phones, transformers, heavy-duty motors, fluorescent
lights, microwave ovens, refrigerators, and other industrial
equipment to prevent signal interference or loss.
• Always update to the latest firmware.Visit the ASUS website at
http://www.asus.com to get the latest firmware updates.
• To ensure the best wireless signal, orient the three detachable
antennas as shown in the drawing below.
450
450
900

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What you need
To set up your network, you need one or two computers that meet
the following system requirements:
• Ethernet RJ-45 (LAN) port (10Base-T/100Base-TX/1000BaseTX)
• IEEE 802.11a/b/g/n wireless capability
• An installed TCP/IP service
• Web browser such as Internet Explorer, Firefox, Safari, or Google
Chrome
NOTES:
• If your computer does not have built-in wireless capabilities,
you may install an IEEE 802.11a/b/g/n WLAN adapter to your
computer to connect to the network.
• With its dual band technology, your ADSL router supports
2.4GHz and 5GHz wireless signals simultaneously.This allows
you to do Internet-related activities such as Internet surfing or
reading/writing e-mail messages using the 2.4GHz band while
simultaneously streaming high-definition audio/video files
such as movies or music using the 5GHz band.
• If you are using only one computer with single band
IEEE 802.11b/g/n WLAN adapter, you will only be able to use
the 2.4GHz band.
• If you are using only one computer with dual band
IEEE 802.11a/b/g/n WLAN adapter, you will be able to use the
2.4GHz or 5GHz band.
• If you are using two computers with both
IEEE 802.11a/b/g/n WLAN adapters, you will be able to use
both 2.4GHz and 5GHz bands simultaneously.
• The Ethernet RJ-45 cables that will be used to connect the
network devices should not exceed 100 meters.

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Connecting your devices
Wired connection
IMPORTANT!
• Use wired connection in setting up your ADSL router to avoid
possible setup problems due to wireless uncertainty.
• Before setting up your DSL-N55U, do the following:
• Disconnect the cables/wires from your existing modem
setup. If your modem has a backup battery, remove it as
well.
• Reboot your computer (recommended).
Network
cable
To set up your ADSL router via wired connection:
1. Insert the splitter’s line connector to the phone outlet and
connect your phone into the phone port.
2. Using the bundled phone cable, connect your DSL N55U’s ADSL
port to the splitter’s DSL port.
3. Using the bundled network cable, connect your computer to
the ADSL router’s LAN port.

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Before you proceed
Disable the proxy server, if enabled.
Windows®7
1. Click Start > Internet Explorer
to launch the browser.
2. Click Tools > Internet options
> Connections tab > LAN
settings.
NOTE: Before configuring your DSL-N55U, do the steps
described in this section for your host computer and network
clients.
3. From the Local Area
Network (LAN) Settings
screen, untick Use a proxy
server for your LAN.
4. Click OK when done.

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MAC OS
1. From your Safari
browser, click Safari
>Preferences >
Advanced > Change
Settings...
2. From the Network
screen, deselect FTP
Proxy and Web Proxy
(HTTP).
3. Cllick Apply Now when
done.
NOTE: Refer to your browser's help feature for details on
disabling the proxy server.

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3. To obtain the IPv4 IP
settings automatically,
tick Obtain an IP address
automatically.
To obtain the IPv6 IP
settings automatically, tick
Obtain an IPv6 address
automatically.
4. Click OK when done.
Set the TCP/IP settings to automatically obtain an IP
address.
Windows®7
1. Click Start > Control Panel
> Network and Internet
> Network and Sharing
Center > Manage network
connections.
2. Select Internet Protocol
Version 4 (TCP/IPv4) or
Internet Protocol Version
6 (TCP/IPv6), then click
Properties.

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MAC OS
1. Click the Apple icon
located on the top left of
your screen.
2. Click System
Preferences > Network
> Configure...
3. From the TCP/IP tab,
select Using DHCP in
the Configure IPv4
dropdown list.
4. Cllick Apply Now when
done.
Disable the dial-up connection, if enabled.
Windows®7
1. Click Start > Internet Explorer
to launch the browser.
2. Click Tools > Internet options >
Connections tab.
3. Tick Never dial a connection.
4. Click OK when done.
NOTE: Refer to your operating system’s help and support
feature for details on configuring your computer’s TCP/IP
settings.
NOTE: Refer to your browser's help feature for details on
disabling the dial-up connection.

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1. Before starting ADSL setting procedure, ensure that the ADSL
indicator on DSL-N55U front panel becomes solid.
2. Launch your web browser.The QIS web page appears
automatically and starts detecting your connection type,VPI/
VCI value and encapsulation mode.
NOTE: If the QIS web page does not appear after you
launched your web browser, disable the proxy settings on your
web browser.
Setting up your ADSL router

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3. Key in the user name and password. Click Apply.
NOTES:
• The PPPoE Internet connection type is used in this setup case.
The setup screen varies with different Internet connection
types.
• Obtain the required information such as the user name and
password from your Internet Service Provider (ISP).
If the QIS cannot detect your Internet connection type, click
Manual Setting and set up the Internet connection manually.

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4. The Internet connection setup is completed.
• Click Going to Internet to surf the Internet.
• Click Simple Wireless Security Setup to configure the basic
security settings including the SSID, authentication, and
encryption methods for the ADSL router. (Recommended)
• Click Back to main page page to go back to the main page
of the web GUI.

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5. Change your network name (recommended) and enter the
password to set up your secure 2.4GHz and 5GHz wireless
environments.

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3 Configuring via the web GUI
Logging into the web GUI
Your ASUS ADSL router comes with an intuitive web graphics
user interface (GUI) that allows you to easily configure its various
features through a web browser such as Internet Explorer, Firefox,
Safari, or Google Chrome.
To log into the web GUI:
1. On your web browser such as Internet Explorer, Firefox, Safari,
or Google Chrome, manually key in the ADSL router’s default IP
address: 192.168.1.1
NOTES:
• For your network clients, ensure that you set the TCP/IP
settings to obtain IP addresses automatically, disable the
proxy server settings, disable the dial-up settings, and cancel
the dial-up connection.
• For more details, refer to the section Before you proceed in
this user manual.
2. On the login page, key in the
default user name (admin)
and password (admin).

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3. The ADSL router’s web GUI launches. Use the web GUI to
configure various settings.