TP-Link TD-W8901G User Manual 2
TP-LINK TD-W8901G
Wireless Modem Router
Advanced Troubleshooting Guide
Released on 2009.09.25
Version 1.0
Content
Summary ................................................................................................................................................................... 3
Troubleshooting Flow Chart and Resolutions .......................................................................................................... 3
Check 1 ................................................................................................................................................................. 3
Check 2 ................................................................................................................................................................. 4
Check 3 ................................................................................................................................................................. 4
Note 1 ................................................................................................................................................................... 5
Note 2 ................................................................................................................................................................... 5
Resolution 1 .......................................................................................................................................................... 6
Resolution 2 .......................................................................................................................................................... 6
Resolution 3 .......................................................................................................................................................... 6
Resolution 4 .......................................................................................................................................................... 6
Resolution 5 .......................................................................................................................................................... 7
Q1. How do I restore my modem router’s configuration to its factory default settings? ................................... 9
Q2. What can I do if I don’t know or forgot my password? ................................................................................. 9
Q3. Why can’t I open some websites like www.msn.com or it opens very slowly? ............................................ 9
Q4. What can I do if I cannot access the web-based configuration page? ........................................................ 10
Q5. How to get the technical support from TP-LINK? ........................................................................................ 15
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Summary
This document attempts to provide the basic procedures for troubleshooting TD-W8901G modem
router problem.
Troubleshooting Flow Chart and Resolutions
Click the quick links for more details:
Check1 Check2 Check3 Note1 Note2
Resolution1 Resolution2 Resolution3 Resolution4 Resolution5
Check 1
1. Make sure that the original power adapter is correctly connected from the modem to the wall socket
and it is not damaged;
2. Make sure that the telephone line is correctly connected from the modem’s LINE port to the filter’s
ADSL Modem port;
3. Make sure that the Ethernet cable is connected from PC to any LAN ports (1/2/3/4) of the ADSL
modem router;
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Check 2
Label
State
Description
Resolution
Power
On
(Steady
Green)
Power On
Check ADSL light.
Off
No Power
Resolution 3
ADSL
On (Solid
Green)
Synchronized
Check Internet light
Flashing
Green
Attempting Synchronization
Wait 2 minutes, if the light does not turn a
solid green, refer to the Resolution 3.
Off
Not Synchronized
Resolution 3
Internet
On (Solid
Green)
The PPP (Internet)
connection is successfully
established
Check LAN lights
Off
There is no successful PPP
connection or the Router
works on bridge mode
Check the PPP username and Password,
VPI/VCI values or refer to Resolution 5
Flashing
Green
Traffic being transmitted
over the Internet
Check LAN lights
LAN
1/2/3/4
On (Solid
Green)
Link between your
computer and your
DSL modem is established
The physical connection between the DSL
modem and PC is working properly.
Off
No link between your PC
and your DSL modem
The physical connection between the DSL
modem and your PC is disconnected or
NOT working properly
Flashing
Green
Traffic being transmitted
over the LAN
The physical connection between the DSL
modem and PC is working properly.
The indicator lights on the front panel of the modem router are used to verify the unit’s operation and
status between your modem, PC and ISP’s network.
The table below describes what the lights mean.
Check 3
Check the Data Rate at the bottom of the Status page.
If the numbers are approximately matched with the ADSL profile provided by your ISP (e.g.
downstream 2Mbps and upstream 512kbps), that means the device is synchronized properly with the
ISP and the quality of the ADSL line is essentially normal.
If the Data Rate number is N/A, it stands for the modem router is not synchronized with your ISP.
Please go to Resolution 3 – For ADSL Light Off.
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Note 1
Open a web browser (either of Windows Internet Explorer, Mozilla Firefox, Apple Safari, Google
Chrome, Opera or any other web browser), key in 192.168.1.1 in the address bar and press enter. The
default username and password are both “admin” (all in lower case).
Refer to the following link for more details: http://www.tp-link.com/support/showfaq.asp?id=87
Note 2
1、 Go to Quick Start, select the correct connection type (PPPoE/PPPoA or the others), and then
enter your local VPI/VCI value and PPP username\password (provided by your ISP), click Save;
Refer to the Quick Installation Guide or http://www.tp-link.com/support/showfaq.asp?id=204 for
more details;
2、 Disable any firewall\wireless MAC filtering\wireless security in the configuration page;
Please refer to the User Guide or Resolution 5 for more details.
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