By accident I pushed the reset button at the back of the MTNL Modem and now the "Internet" light is gone. How can I fix this? (Can it be done by going to the setting tab http://www.192.168.1.1// and changing some setting?)
What is the make of your ADSL router? If D-Link, TP-Link or Netgear, it would have a setup wizard where you can select the ISP and by providing the login details it should take care of the configuration. Your broadband username would either be <phonenumber> or <phonenumber>@a. Password is your CA (Customer Account) number which you can find on your telephone bill.