When an online-only device performs IAC-Online and TAC-Online processing the only relevant TVR bit is "Transaction value exceeds the floor limit". Because the floor limit is set to zero, the transaction should always go online and all other values in TAC-Online or IAC-Online are irrelevant. Online-only devices do not need to perform IAC-default processing. An online-only device such as an ATM always attempts to go on-line with the authorization request, unless declined off-line due to IAC-Denial settings. During IAC-Denial and TAC-Denial processing, for an online only device, the only relevant Terminal verification results bit is "Service not allowed".
