Interconnection is the largest source of revenue for established communication service providers. For start-ups, interconnect accounts for almost 50% of their revenue. Interconnect service is a significant revenue generator, but it may also have significant costs. A good Interconnect Billing System provides a mechanism to ensure an acceptable ROI to the operator. In addition to plugging different issues, an interconnect billing system can also provide advanced features like interconnect data analysis and least cost routing, which gives additional revenue opportunities to the operator.