I am a BSNL Dataone user and as any BSNL user knows that in case of problem u can turn towards BSNL for help. So, I guess I should help fellow users to let know the solutions to common problems I faced or face.

problem When trying to dial and connect to BSNL you get Error 678 – Remote computer is not responding.
sol Make sure that the link light of your modem (actually router) is ON (green). If not then wait for about 2 mins. If still not contact ur BSNL local exchange.

If the link light is lit happily then make sure the router is connected to ur computer. Now turn OFF the router. And now turn it ON. Wait for link light to turn ON. Now try. It should connect now.

problem I get Invalid Username or Password and I am pretty sure that they r correct.
sol Nothing. It happened to me sometimes. Just keep redialing.

problem The check usage site doesn’t open.
sol Then goto alternative portals of the same site. Try any one of the followings.
http://10.240.43.216/
http://10.240.89.199/
http://10.240.16.195/
http://10.240.0.195/

problem Connection gets lost after a power cut though u r using an UPS.
sol My router (Huawei MT882) has this problem. The reason I guess is that it is extremely sensitive to slight distruption of power which happens when online UPSs switch to battery mode from AC mode. So, getting an offline UPS may help.