1) Make sure CAPS lock is turned off as Usernames and Passwords are case sensitive.

2)Please make sure you use your user name in the below mentioned formats.
a)[email protected]
b)[email protected]
c)[email protected]
d)[email protected]

3)Retype your password to make sure it is correct.

4)Verify that the ADSL/WAN Link light on your modem is on and solid (not flashing).

5)If you forgot your user name/password, please speak to our technical support team.
Authentication Failure
What are Username & Password Errors?
Before contacting the Airtel HelpDesk, try the following
If your ADSL connection requires you to enter a username and password to connect, and your password is being rejected (Error 691).
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