 Other features of the residential portion of the Verizon Building include rooms for wine-tasting and billiards; music practice; a fitness center; a children's playroom; and a residents' lounge.The Verizon Building has five sub-basement levels, which house communications equipment.At the time of the September 11 attacks, Verizon was using the building as a main telecommunications switching center in Lower Manhattan, handling approximately 200,000 phone lines and 3.6 million data circuits.