NIB is National Information Backbone Part 2. Your IP suggests you are on NIB-II, just like me. So you shouldn't get such low speeds with 500C plan. Very strange.
Can you post the screenshot of your modem's Signal and Attenuation figures? (Take screenshot when the connection is very slow).
In my case (morning 0630 hours):
http://img87.imageshack.us/my.php?image=c3ey3.jpghttp://g.imageshack.us/thpix.php
My figures are horrible still I get 1600kb/second in Dataone speedtest just now.
Try a test: Reboot your computer and make sure no unwanted programs or services are running. Go to Start>>Run>>type 'msconfig' and see what programs are starting automatically. Disable unecessary stuff.
Also make sure you do not schedule torrents etc to run obn schedule automatically. Run 'Spybot search and destroy' as well as '
Microsoft Malware removal tool'.
Then try Dataone Speedtest.
If you see no improvement, the problem is on BSNL side.
Contact (for Kanpur):
Name of Public Grievance Officer: Sri R.C.Shukla,DE(Trk.)
Address: GMTD, Kanpur
Phone: 0512-2311533
Fax: 0512-2311505
AND:
Name: Shri R.S.Tripathi AGM
Phone: 2364777
Fax: 2311505
Email!: pg_kp@bsnl.co.in
Give these people all the facts and figures in great details, and they will try to help you.