 These can in turn be redeemed for cash at an automated kiosk.The machines utilize a barcode scanner built into the bill acceptor, a thermal ticket printer in place of a coin hopper (some rare machines are set up to pay with coins if the payout is less than the payout limit, and to print a ticket in situations where a handpay would normally be required) and a network interface to communicate with a central system that tracks tickets.MGM was in the middle of construction of its major hotel in Las Vegas and invited several gaming machine manufacturers to join a consortium for its Cashless Casino experiment.