Calix, Inc., together with its subsidiaries, develops, markets, and sells broadband communications access platforms, systems, and software for fiber- and copper-based network architectures that enable communications service providers (CSPs) to transform networks and connect to residential and business subscribers. The company develops and sells carrier-class hardware and cloud products to enhance and transform CSP access networks to meet the demands of subscribers. Its portfolio consists of three core systems and/or nodes: E-Series access systems and nodes, B6 access nodes, and the C7 multiservice, multiprotocol access system. The company also offers the P-Series optical network terminals and residential gateways; the GigaFamily of GigaCenters, GigaHubs, and GigaPoints; and the Calix Management System, OpenLink cable software, and Compass Cloud family of software-as-a-service products. Its portfolio serves the CSP network from the central office or data center to the subscriber premises and enables CSPs to deliver voice, high-speed 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, Canada, Europe, and internationally through its direct sales force and resellers. Calix, Inc. was founded in 1999 and is headquartered in Petaluma, California.