VoIP billing solution not only needs improvising the system with a carrier or providers, but also needs improvement within the billing system. At iNextrix, we offer services such as the creation and classification for improving the in-house service; posting CDRs from different resources and forwarding invoices to end customers. The iNextrix VoIP billing solution lets service providers to effectively manage and properly bill the VoIP usage. At iNextrix, we offer VoIP fraud management solutions and leakage free rating options. With the help of rating capabilities and authentication, iNextrix VoIP billing solution permits Internet Telephony Service Providers to exploit the most from their giveaways while securing worthy revenue sources through its fraud management, revenue assurance facility and leakage free CDR rating. When it comes to the rating system, an innovative infrastructure is preferable than the traditional rating system. VoIP call providers can now yield a competitive rate plan conversion, which is up to 70% fewer price to handle with revenue leakages. Traditional LERG revenue conversion system has been renovated to a geography tree. Calling rates can be inserted anywhere in the geography tree. In addition, the company can configure the rate with any desired data. This can be calculated as per rate for a country or using individual long distance dialing patterns.