Calix, Inc. develops, markets, and sells broadband communications access systems and software for fiber- and copper-based network architectures that enable communications service providers (CSPs) to transform their networks and connect to their residential and business subscribers. Its Unified Access portfolio includes various platforms and/or nodes comprising the E-Series Ethernet service access platforms and nodes, the B6 Ethernet service access nodes, the C7 multiservice and multiprotocol access platform, and the BLM1500 gigabit passive optical network access terminal. The company’s platforms, nodes, and terminals also include P-Series and T-Series optical network terminals, and residential gateways and GigaCenters; and the Calix Management System, Entriview element management software, OpenLink Cable software, and Compass suite of value-added software applications. Its portfolio serves the CSP network from the central office or data center to the subscriber premises and enables CSPs to deliver basic voice and data, and broadband services over legacy and next-generation access networks. The company markets its access systems and software to CSPs in the United States, the Caribbean, Europe, Canada, and internationally through its direct sales force and resellers. Calix, Inc. was founded in 1999 and is headquartered in Petaluma, California.