ADC of Eden Prairie, Minn., has purchased Fiber Optic Network Solutions (Fons) Corp., a Marlborough, Mass., supplier of passive optical components and fiber optic cable packaging, distribution and connectivity products. The purchase approximately doubles ADCs outside plant business to more than 10 percent of its total sales. The acquisition was completed for roughly $172 million in cash, including a retention bonus pool that will be paid to Fons employees.