[Freeswitch-users] Using * as "terminate and cancel"

Is there a way to get playAndGetDigits to allow the user to enter a (telephone) number, but if they decide part way through that they messed up and they want to abort, they can press * - and then (without checking validation) the lua script knows that they pressed * rather than the more normal # (which means "I've finished - now go do it!").