bridged mode is when you use your computer to
dial.
We want your modem to
dial and act as a gateway for your computers.
I would need some help from you here. Can you provide me with some screenshots of your modem's interface? You need to go to
http://192.168.1.1 and provide me with the screens for your modem. I am unable to locate them on the internet.
Edit:
I have attached a new screen shot from BSNL's website for a similar modem. Try to see if your problem is solved using these instructions.