Converged Billing for ISPs

ISP stands for Internet Service Provider. Till now they are renowned for providing only internet access to the subscribers but the decade of 2000 is seeing growth of local loop telephony companies providing the basic telephony services to the subscribers over new technologies and competing with the national Telcos. This whitepaper discusses the market opportunities for VoIP providers and few constraints to their success. It also gives a brief introduction of "Soft Phones (Also called Dialer)". Finally, whitepaper precisely explains the difference between two business models i.e. "Prepaid" and "Postpaid".