Calix Inc (Calix) is a provider of cloud and software platforms. The company offers solutions for professional services, managed services, support services, education services, customer success services and marketing services. The company markets and sell its products to all sizes of broadband subscriber and service providers.

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Calix’s R&D activities focus on designing, development and enhancement of its cloud and software platforms and systems. The company tests its software and systems to ensure the compatibility of products with third-party hardware and software products. Its R&D facilities are in San Jose, Minneapolis, Richardson and Petaluma, the US; Bangalore, India; and Nanjing, China. As of December 2023, the company had a portfolio of 111 US patents and 26 pending patents. In FY2023, it incurred expenses of US$177.7 million of R&D, which as a percentage of revenue, stood at 17.1%.