Hmm, 1second google search for your model brought up these results, if it works dont worry about the coins, this one is on me.

Go to Control Panel > Select Phone & Modems > Select the Required Modem > Go to Properties of that Modem > Select Advance TAB & insert Extra Initialization Command (AT+CGDCONT=1, "IP", "BSNLNET")
Press OK
Now Select Network Connections in Control Panel
Click on "Create new Network".
A wizard will start up. Click next.
Select "Connect to Internet". Click next.
Select "Set up my connection manually". Click next.
Select "Connect using a Dial-up Modem". Click next.
Select Your Modem. Click next.
ISP Name: (Any name could be written). Click next.
Phone Number: *99#. Click next.
Leave User Name, Password, and Confirm Password fields blank. Click next.
Click on "Add a shortcut to Desktop". Click on Finish.
Right click on the Dial-up connection and go to Properties
Select options Tab
In Redialing options
Change Redial attempts to 99
Change Time between Redials to 1 Sec.
Chnage Idle time before hanging up to never
Tick the Box which says Redial If line is dropped.


If you get error 619, make sure to check this:

Goto tools> options> general> select Ras (Modem) radio button in connection type and press Ok. Then connect the internet and it will automatically creates a Dial-up for you.