Consolidation has taken hold of ancillary operations as well, especially towers. Last year, American Towers (ATC) bought Viom Networks and lowered the combined workforce by about a third, said people aware of the matter. This was followed by the $1.6 billion takeover of RCom's towers by Brookfield. Every tower company is in play-- Idea and Vodafone want to sell standalone operations as do smaller outfits like Tower Vision. The larger Bharti Infratel and Indus Towers are also expected to see a change in control.