Calix, Inc. provides broadband communications access systems and software for fiber and copper-based network architectures that enable communications service providers (CSPs) to connect to their residential and business subscribers. The company’s Unified Access portfolio comprises carrier-class hardware and software products, which include C-Series platform, and E-Series platforms and nodes. The C-Series platform is a C7 multiservice and multiprotocol access platform that supports an array of basic voice and data services, as well as advanced, high-speed, and packet-based services, including gigabit Ethernet, GPON and DSL, and advanced applications, such as IPTV offered by CSPs. The E-Series platforms and nodes consist of chassis-based platforms, and fixed form factor nodes that support various advanced IP-based services, and enable CSPs to implement advanced Ethernet transport and aggregation; and voice, data, and video services over both fiber and copper-based network architectures. The company’s Unified Access portfolio also includes P-Series Optical Network Terminals, which can auto-detect the bandwidth of the network and enable CSPs to change line rates and features without truck rolls or hardware replacements; and Calix Management System, a server-based network management software that enables CSPs to remotely manage their access networks and scale bandwidth capacity to support advanced broadband services and video. Calix, Inc. markets its access systems and software to communication service providers in North America, the Caribbean, and Latin America directly. The company was founded in 1999 and is headquartered in Petaluma, California.