Ever since BSNL increased their speeds to upto 2Mbps, the home 500 series plans have become the best for downloads. Tired of waking up at 2 AM ? why not schedule your downloads then ?
If you have set your connection such that you have to dial it then read on. if your connection is such that you just have to reboot your router, see this
I’m assuming that you are using windows and IDM. needn’t necessarily be IDM. you can use any download/torrent manager that can schedule downloads. That part is upto you. I’ll just explain only how to dial the connection.
First go to internet options from control panel. navigate to the connections tab and select the radio button that says never dial a connection. apply changes.
next, open notepad and type
rasdial <connection_name> <username> <password>
for eg, if your connection name is BSNL_BB, username is vysakh and password is 123456, then use rasdial BSNL_BB vysakh 123456
save the file as “dial.bat” (you can use any name ofcourse. just make sure you save it as a .bat file and not as a .txt file. hence use the quotes.)
open notepad again and type
rasdial <connection_name> /disconnect
for eg. rasdial BSNL_BB /disconnect
save this file as “disconnect.bat” now go to scheduled tasks (from control panel or from start menu) and click on Add scheduled tasks
The wizard will open up. click next and it shows a whole lot of programs which we are least bothered about. click browse and find the dial.bat and select it. select daily and set the time as 02:05 and click next, enter your username and password (not the connection’s, but your windows’)
if you get an access denied error, then double click the task from the task list and check Run only if logged on
Similarly, do the same for disconnect.bat and set the time as 07:55
BSNL’s timing is quite weird. so to be on a safer side, use 2:05 and 7:55 and not 2:00 and 8:00
Now schedule the download at 2:06 in your download manager and thats it. 
Just keep your system on, preferably with the user logged on and your download manager running in the background. Retire to bed. Your computer will automatically dial the connection at 2:05. the download manger will then start the download process a minute later and when its 7:55 you will get disconnected and so downloads would stop.
There you go, life made much more simple. Any queries/doubts, feel free to ask.
