By the instructions that I have seen on http://mr-greens.blogspot.com/2010/05...

By the instructions that I have seen on http://mr-greens.blogspot.com/2010/05/bsnl-huawei-ets-1201-modem-install... it appears that the device does not automatically configure the driver to work.
You can follow the instructions on that website to use wvdial or if you want to make your system auto-recognize the device then we can help you further after you share the output of the lsusb command after the device is plugged int.

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