Tollgrade Communications is located in Cheswick, PA, and I worked for them from November 2001 to May 2002.
Tollgrade Communications, Inc. provides network assurance testing for the global telecommunications and cable broadband industries. Tollgrades proven hardware and widely used LoopCare software enable telephone and cable operators to maximize the efficiency of their access networks and accelerate the rollout of digital broadband services.
If you would like to visit their web page click on the graphic below.