[FAQ ID: 477]ADSL Modem Router All-in-one Troubleshooting Guide

Suitable for: Wireless ADSL2+ Modem Routers, ADSL2+ Modem Routers

This article is intent on telling you how to do the troubleshooting if fail to install the modem router. The following flow chat is the whole picture of troubleshooting process.
Physical Connection
·         Connect ADSL phone line to ADSL/LINE port of modem router
·         Connect a computer to one of the LAN ports (yellow) with Ethernet cable
·         Plug the power adapter to the modem and switch on it.
  Note: if you use a splitter to connect your phone as well, check the bellowing:
Light Status:
Check the lights on the front panel of the modem router, normally you should have the bellowing lights:
1)Power light should be solid;
·      2) ADSL light should be solid;
    If ADSL light is flashing or off
1)        a)Remove the splitter, just connect the phone line directly to the modem
2)        b) Contact ISP to check ADSL line service if it remains off.  
·      3)The corresponding LAN light should be on or flashing when a computer is plugged in.
·      4)If it is a wireless modem router, the wireless signal light should also be flashing by default.
Before the installation, make sure you are aware of the username, password, connection typeVPI/VCI numberprovided by your Internet Service Provider. If you are not sure about the information, contact your ISP to doublecheck them firstly.
There are two ways to install the modem router: one is to run the Easy Setup Assistant with the CD; the other is to run Quick Setup/Quick Start on the web management page.
Normally, there should be a mini disk inside the package which is suitable for windows computer. If you don’t have the CD, you can go to www.tp-link.com to download the software as well;
If you have a MAC OS computer or others which can’t support the software, please adopt Method 2.
Here is the details of  Note 1 in the flow chart above:
Note 1 Log into the Web-interface;Run Quick Setup/Start.
If you have these models(Trendichip Solution): TD-8816, TD-8817, TD-8840T, TD-W8901G, TD-W8951NB, TD-W8151N,TD-W8901N,TD-W8951ND, TD-W8961NB, TD-W8961ND, TD-W8961N
Please follow these instructions for help: 
1)Connection type is PPPoA
2) Connection type is PPPoE
       3)Connection type is IPoE or Dynamic IP 
4)Connection type is IPoA or Static IP 
       If you have these models( Broadcom solution): TD-W8950N ,TD-W8950ND, TD-W8960ND, TD-W8960N, TD-8840, TD-8810, TD-W8960NB, TD-W8910G, TD-W8920G, TD-W8968 V3
Please follow these instructions for help:
1)Connection type is PPPoA
Please follow these instructions for help:
2) Connection type is PPPoE
3)Connection type is IPoE or Dynamic IP 
4)Connection type is IPoA or Static IP 
Note 2 Check the WAN Status
If the status is still Down/PPP Down/Authentication Failure,
For Trendchip solution: on the web management page, click on Status, it shows Down in WAN section.
For Broadcom solution: on web management page, click Device Info->WAN, it shows Authentication FailureOR PPP Down under status.
Note 3 Confirm information with your ISP;Run Quick Setup/Start again.
       1.Confirm information like username, password, connection typeVPI/VCI number with Internet service provider.
       2.Make sure username and password are typed in correctly.
·         Username and password are both case-sensitive;
·         If your username is like an e-mail address, please input the whole email address including @xxx.com.xx.
·         Be careful if there is letter O or number 0. Don’t confuse O with 0, vice verse.