About Us TSI Voice & Data is the leading communications specialist providing unmatched quality service and products for Northwestern Wisconsin & the Chippewa Valley. Business communications can encompass a vast array of telecommunications services. It is our goal to specially craft items and administrations for each of our clients needs. We exclusively design each telecommunications framework for our customers because we recognize that all our customers, from small companies to those with several locations, have unique needs. We are committed to establishing and maintaining a dynamic and long term telecommunications association with each and every customer within our telecommunications area. Contact us to set up a communication system to connect your whole business.