TP-Link TD-8841 User manual

TD-8841
External ADSL2+ Router
Rev: 1.0.3
1910010126

I
COPYRIGHT & TRADEMARKS
Specifications are subject to change without notice. is a registered trademark of
TP-LINK TECHNOLOGIES CO., LTD. Other brands and product names are trademarks or
registered trademarks of their respective holders.
No part of the specifications may be reproduced in any form or by any means or used to make any
derivative such as translation, transformation, or adaptation without permission from TP-LINK
TECHNOLOGIES CO., LTD. Copyright © 2008 TP-LINK TECHNOLOGIES CO., LTD. All rights
reserved.
http://www.tp-link.com

II
FCC STATEMENT
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following
measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
•Consult the dealer or an experienced radio/ TV technician for help.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions:
1) This device may not cause harmful interference.
2) This device must accept any interference received, including interference that may cause
undesired operation.
Any changes or modifications not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.
CE Mark Warning
This is a class B product. In a domestic environment, this product may cause radio interference, in
which case the user may be required to take adequate measures.
SAFETY NOTICES
Caution:
1) Do not use this product near water, for example, in a wet basement or near a swimming pool.
2) Avoid using this product during an electrical storm. There may be a remote risk of electric
shock from lightning.

III
CONTENTS
Package Contents .................................................................................................... 1
Chapter 1. Product Overview............................................................................... 2
1.1 Product Main Specification........................................................................................ 2
1.2 Supporting Protocol................................................................................................... 2
1.3 Transmit Data-rate .................................................................................................... 3
1.4 ATM Property ............................................................................................................ 3
1.5 System Support......................................................................................................... 3
1.6 Working Environment ................................................................................................ 3
Chapter 2. Hardware Installation Guide.............................................................. 4
2.1 System requirement .................................................................................................. 4
2.2 LED explanation ........................................................................................................ 4
2.3 Rear-panel ................................................................................................................ 4
2.4 Hardware installation procedures.............................................................................. 5
Chapter 3. System Configuration ........................................................................ 6
3.1 Computer Configuration ............................................................................................ 6
3.2 Login ......................................................................................................................... 7
3.3 Quick Setup............................................................................................................... 7
3.3.1 PPPoA..............................................................................................................................8
3.3.2 PPPoE............................................................................................................................10
3.3.3 MER................................................................................................................................11
3.3.4 IPoA................................................................................................................................13
3.3.5 Bridging ..........................................................................................................................14
3.4 Change Password................................................................................................... 15
3.5 lWeb Setup.............................................................................................................. 16
3.6 Software Dial ........................................................................................................... 26
3.7 USB Configuration .................................................................................................. 28
Chapter 4. Advantage Management Setup ....................................................... 34
Appendix A: FQA ................................................................................................... 35
Appendix B: Default Configuration ...................................................................... 36
Appendix C: Configuring the PCs ........................................................................ 37

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Package Contents
The following items should be found in your package:
¾One TD-8841 External ADSL2+ Router
¾One AC power Adapter for TD-8841 External ADSL2+ Router
¾One Resource CD for TD-8841 External ADSL2+ Router, including:
zThis Guide
zQuick installation Guide Program
zOther Helpful Information
zUSB driver
¾Quick installation Guide
¾One RJ45 cable
¾Two RJ11 cables
¾One ADSL splitter
¾One USB cable
)Note:
Make sure that the package contains the above items. If any of the listed items are damaged or
missing, please contact with your distributor.

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Chapter 1.Product Overview
With the excellent circuit design and high quality production, we guarantee the ADSL2+ Router’s
high performance, great stability and easy to use.
In addition to the basic DMT physical layer functions, the ADSL2+ PHY supports dual latency
ADSL2+ framing (fast and interleaved) and the I.432 ATM Physical Layer.
The TD-8841 is a complete plug-and-play solution. With standard Ethernet interface, it can be
directly connected to any 10M/100M Ethernet devices, support Auto-MDIX.
The TD-8841 uses not only html (web mode through Ethernet port) but also external utility
software to configure the Router. You can download it from our website (http://www.tp-link.com).
1.1 Product Main Specification
¾High speed and asymmetrical data transmit mode, provides safe and exclusive bandwidth
¾Supports All ADSL2+ industrial standards
¾Compatible with all mainstream DSLAM (CO)
¾Firmware upgradeable
¾Provides integrated access of the Internet and route function which face to SOHO user
¾Advanced DMT modulation and demodulation
¾Real-time Configuration and device monitoring
¾Quick response semi-conductive surge protection circuit, provides reliable ESD and
surge-protect function
1.2 Supporting Protocol
¾G.992.1 (G.dmt) - Annex A/B/C
¾G.992.2 (G.lite) - Annex A/B/C
¾ANSI T1.413
¾G.992.3 (ADSL2) Annex A/B/C/M and Annex L (RE-DSL) compliant
¾G.992.5 (ADSL2+) Annex A/B/C and Annex L (RE-DSL) compliant
¾ADSL dual latency (fast path and interleaved path)
¾I.432 ATM physical layer compliant
¾Supports RFC2364 (PPPoA)
¾Supports RFC2516 (PPPoE)

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¾Supports RFC1483 (EoA)(Bridged *and Router)
¾Supports RFC1577 (IPoA)
)Note: “*” Needs the third-party software.
1.3 Transmit Data-rate
¾Max download data-rate: 24Mbps
¾Max upload data-rate: 3.5Mbps
¾Max line length: 6Km
1.4 ATM Property
¾AAL0, AAL5, OAM, RM, and raw cell types supported
¾Direct hardware support for 4 Receive VCs, with additional RX VCs and TX VCs supported in
software
¾Full 24-bit Virtual Path Identifier (VPI) and Virtual Circuit Identifier (VCI)
1.5 System Support
¾Support PVC
¾Support NAT、DHCP and so on
¾Support IEEE 802.3、IEEE 802.3u
¾Support 10Base-T/100BASE-TX full-duplex or half duplex Ethernet
¾Support Auto-MDIX
¾Support USB 1.1 device interface
1.6 Working Environment
¾Operating temperature: 0 ~40℃℃
¾Storage temperature: -40 ~70℃℃
¾Humidity: 10%~90% (non-condensing)

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Chapter 2.Hardware Installation Guide
The TD-8841 maintains six separate interfaces, including four Ethernet interfaces, one USB
interface and one ADSL interface. The Router should not be located where it will be exposed to
moisture or excessive heat. Place the Router where it can be safely connected to the various
devices as well as to a power source.
2.1 System requirement
Confirm your computer has been installed with networking interface card (NIC) before connecting
ADSL2+ Router to your computer, with the operating system supporting the TCP/IP protocol.
2.2 LED explanation
The front panel of ADSL2+ Router includes one power indicator and eight function indicators, as
explained in following chart:
Name Status Indication
On Power is OK
Power Off Power fail
Flash The ADSL Router is training
On The LINE port is linked up
ADSL
Off The LINE port is linked down
On There is a mistake when ADSL is transmitting or receiving data
Alarm Off ADSL works normally
Flash There is data being transferred on WAN port
ACT Off No data is being transferred on WAN port
On The LAN port is connected but there is no data being transferred
Off There is no physical connection
LAN(1~4)
Flash There is data being transferred on LAN port
On The port has been connected but there is no data being transferred
Off There is no physical connection
USB
Flash There is data being transferred on USB port
2.3 Rear-panel
¾ON/OFF: Turn on/off the ADSL2+ Router’s power.
¾POWER: please do not use any unknown power adaptor; otherwise your ADSL2+ Router

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may be damaged.
¾RESET (reset default): When the Router is working properly, press the RESET button for at
least 5 seconds and then wait for it to reboot to its factory default settings.
¾LAN: Connect with your computer’s NIC.
¾USB: Connect with your computer’s USB interface.
¾LINE (WAN): Connect to the MODEM Port of Splitter or connect to the telephone line port.
2.4 Hardware installation procedures
The procedure to install the Router can be described in general terms in the following steps as
shown in Figure 2-1:
First Step: Connect the MODEM port of Splitter with the LINE port of the TD-8841 ADSL2+
Router by telephone line. While you need to use a telephone, please attach telephone line into the
phone port of Splitter.
Second Step: Connect category 5 cable with RJ45 jacks to ADSL2+ Router’s LAN port and your
computer’s NIC. Or connect USB cable to ADSL2+ Router’s USB port and your computer’s USB
interface.
Third Step: Plug one end of the AC Power Adapter into the Power jack on the Ethernet ADSL2+
Router and the other end to a standard electrical outlet.
Last Step: Check the line connection to see if everything is ready. Power up finally.
Figure 2-1

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Chapter 3.System Configuration
3.1 Computer Configuration
The default IP address of the ADSL2+ Router is 192.168.1.1, and the default Subnet Mask is
255.255.255.0. These values can be seen from the LAN, and can be changed as your desire. As
an example, we use the default values for description in this guide.
1. Connect the cable according to Chapter 2, turn on the power.
2. Connect the local PCs to the ADSL2+ Router’s LAN port. There are then two ways to
configure the IP address for your PCs.
¾Configure the IP address manually
1) Set up the TCP/IP Protocol for your PC(s).
2) Configure the network parameters. The IP address is 192.168.1.xxx ("xxx" is from 2 to
254), Subnet Mask is 255.255.255.0, and Gateway is 192.168.1.1 (The ADSL2+
Router’s default IP address).
¾Obtain an IP address automatically
1) Set up the TCP/IP Protocol in "Obtain an IP address automatically" mode on your
PC(s).
2) The built-in DHCP server will assign IP addresses for the PC(s).
)Note:
If you need instructions as to how to do this, please refer to 6Appendix C: Configuring the PCs.
Remarks: you can check whether your configuration is successful through PING command. Enter
Ping 192.168.1.1
If the screen looks like the following, you have been successful.
If the screen looks like the following, the connection has failed. Please try again.

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3.2 Login
Startup Internet Explorer, and enter 192.168.1.1; When ADSL2+ connection is OK, the following
login box will pop up. Enter default user name (admin), password (admin); as shown in Figure 3-1.
Figure 3-1
3.3 Quick Setup
1) Figure 3-2 is the main page of the Router.

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Figure 3-2
2) Please select Quick Setup. Enter the VPI and VCI values provided by your Internet Service
Provider (ISP) and click Next.
Figure 3-3
3) Select the relevant Connection Type and Encapsulation mode as the settings provided by
your ISP and click Next
3.3.1 PPPoA
a) Select PPP over ATM (PPPoA) Connection Type, and click Next.

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Figure 3-4
b) Enter the Username and Password provided by your ISP and click Next.
Figure 3-5
c) Click Save/Reboot.

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Figure 3-6
3.3.2 PPPoE
a) Select PPP over Ethernet (PPPoE) Connection Type, and click Next.
Figure 3-7
b) Enter the Username and Password provided by your Internet Service Provider and click
Next.

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Figure 3-8
c) Click Save/Reboot.
Figure 3-9
)Note:
The Router will restart when you complete the configuration, so you have to wait for a while
until it restarts successfully.
3.3.3 MER
a) Select MAC Encapsulation Routing (MER) Connection Type, and click Next.

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Figure 3-10
b) Enter the parameters provided by your ISP, then click Next.
Figure 3-11
c) Click Save/Reboot.

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Figure 3-12
3.3.4 IPoA
a) Select IP over ATM (IPoA) Connection Type, and click Next.
Figure 3-13
b) Enter the parameters provided by your ISP, then click Next.

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Figure 3-14
c) Click Save/Reboot.
Figure 3-15
3.3.5 Bridging
a) Select Bridging Connection Type, and click Next.

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Figure 3-16
b) Click Save/Reboot.
Figure 3-17
)Note:
After you complete any setup, the new setup must be saved and the Router must be
restarted for the configuration to take effect. Please click the Save/Reboot button to restart.
3.4 Change Password
You will then see the Figure 3-18, which displays some information such as link rate and so on.

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Figure 3-18
Default value of user name and password is “admin”; if you want to change them, please go to
“Management” Æ“Access control”Æ“Passwords” changing them. (Figure 3-19)
Figure 3-19
3.5 Web Setup
Choose “Advanced Setup”Æ“WAN”, and you will enter the page of Wide Area Network (WAN)
Setup, as seen in Figure 3-20.