Connect your USB Wireless local Loop Phone (WLL) in ubuntu linux

In most of the countries like India (BSNL), Pakistan (PTCL) , Brazil, Brunei, Myanmar Internet Service providers are supplying USB Wireless Local Loop Phones (WLL). I have found a very good howto for connecting WLL in Ubuntu Linux, it can be used for all other distributions. It is tested in India with ISP BSNL , Click here