Hewlett Packard Enterprise, 890 Technology Way, Chippewa Falls, WI 54729, US

Established in 1979, Communication Systems International provides a range of AT&T telephony and networking solutions to several clients throughout the Midwest. Based in Chippewa Falls, Wis., it offers services pertaining to local/wide area networking to a 3000-strong client base in the region. It offers Internet services, data-managed services, voice services, IP services and virtual private network (VPN) solutions to numerous businesses. It also has association with companies, such as One Communications, Qwest and Air Spring.