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Visitor InformationROI headquarters and the CAI division are located in Barrington, Illinois, a northwest suburb of Chicago. We are proud of our 100,000-ft2 facility, designed and built specifically for the design, manufacture and test of our sophisticated products. Visitors are welcome, but because of the nature of our technology and customers, some restrictions must enforced. Please see our security page for information on those restrictions. Because ROI is located close to Chicago, the facility is easy to get to, and a map is supplied on the map/parking page. Suggestions for places to stay are given on our lodging page. Pacific Optical, whose facilities are located in Riverside California, also welcomes guests. Visitor information is contained in the Pacific Optical section of the web site.
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