INTERNETWORKING INTERFACE FUNCTION FOR CHARGING AND BILLING IN IP TELEPHONY SERVICES

The recent development in the field of telecommunication technology and the popularity of the internet have caused the changes in the field of communication, which moves towards to new innovative communication through IP networks like IP telephony. Therefore, IP Telephony requires the support of guaranteed quality of services and charging to provide service for potential customers, which makes some significant changes in the billing network model of telecommunication. The billing model support different level of services in terms of quality and charging requirement made by the users and would be the most efficient in terms of prices to be paid. This paper suggests a methodology to resolve the specific problem of internetworking between IP and PSTN networks for supporting quality voice calls to make true charging. The main objective of the paper is to propose the internetworking interface function (IIF) with the charging and billing methods over the IP telephony and PSTN networks.