R.R. DONNELLY <DNY> TO SELL CABLE SYSTEM R.R. Donnelly and Sons Co said it reached an agreement with Adams-Russell Co Inc <AAR> to sell Adams its Rockford, Ill., cable system for an undisclosed price. R.R. Donnelly said it expects the deal to close in about 120 days, subject to regulatory approvals and other conditions. The cable system serves about 51,000 subscribers in the communities of Rockford, Loves Park, Machesney Park, Cherry Valley, Morristown and Winnebago County, Ill., R.R. Donnelly said.