TP-Link TD-8840T User Manual page 76

3) Consult your ISP and make sure all the VPI/VCI, Connection Type, account username and
password are correct. If there are any mistakes, please correct the settings and try again.
4) If you still cannot access the Internet, please restore your Modem Router to its factory default
settings and reconfigure your Modem Router by following the instructions in
5) Please feel free to contact our Technical Support if the problem still exists.
Note:
For more details about Troubleshooting and Technical Support contact information, please log on
to our Technical Support Website: http://www.tp-link.com/en/support
TD-8840T ADSL2+ Modem Router User Guide
70
4.1 Login.