Infinera designs photonic integrated circuits intended to replace much larger components within optical networks. It also offers networking equipment built around these chips. Infinera’s chips are made from indium phosphide, a specialized compound semiconductor material that offers light-years faster performance than standard silicon. Customers include cable system operators, Internet service providers, and telecommunications carriers, such as Freenet, Global Crossing, Level 3 Communications (60 percent of sales), Qwest Communications, and XO Communications.