Method-1
Your configuration is totally correct the problem is in the server not in your modem or system or connectivity. BSNL broadband have problem even if the DSL light is stable.
Another reason is notice if the yellow DSL light in the modem get stable and then start re blinking if yes then also its the broadband issue rest check your line if having disturbance that cause this error too.
Configuration is all about connectiong wifi /modem to system if you are able to see your modem in your wifi list. your configuration is correct!
Method-2
First acquire username and password from BSNL.
Step - 1 Create PPOE always on connection by entering username and password. on windows IP settings give a ip address the default gateway and DNS server address should be the ip address of the router.
Step - 2 Use these :
Hope this helps.
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