The present invention is intended to prevent from billing an unnecessary charge to an user by omitting AIS signals transmittedreceived between a transmission side ATM unit and a receiving side ATM unit when a loss of service occurs in a communication network in which existing communication lines are connected by an ATM communication unit. Field-free conditions can be established in at least one region of the chamber. The syllabic roulette game comprises a roulette wheel, a wager-enabling layout, and a plurality of balls.