Tollgrade Communications, Inc. is a leading provider of network service assurance products and services for centralized test systems around the world. Tollgrade designs, engineers, markets and supports centralized test systems, test access and status monitoring products, and next generation network assurance technologies. Tollgrade’s customers range from the top telecom and cable providers, to numerous independent telecom, cable and broadband providers around the world. Tollgrade’s network testing, measurement and monitoring solutions support the infrastructure of cable and telecom companies, as well as for power distribution companies.