I was also facing the same problem, but my problem arose when one and a half month back Airtel guy upgraded the firmware on my Beetel 220Bx, he told me that this firmware is much better than the previous one.
Any ways after the upgrade, I was facing several issues, connection will not get through in one attempt, it may disconnect any time, and yes very sloooooow loading of modem interface.
So what I did, I just visited Beetle Modems page at
Welcome to Beetel Modems and downloaded
http://www.beetelmodems.com/download/220bx/T28-0q-003.zip then updated my modem's firmware (you may say I downgraded).
Now this downgraded process took almost 35 minutes, I just waited, in the end the process completed.
So now I have my same old Beetel 220Bx working great, it connects in one go, no disconnection, and super fast loading of DSL interface.
Not just this, I am experiencing a bit faster surfing and download speed too.