Msr Fallback Flow - Magtek Universal SDK Programmer's Manual

Appendix C - EMV Transaction Flow
C.3

MSR Fallback Flow

The use case for an MSR fallback is when communication with the chip results in a terminated
transaction and the TransactionStatus is reported as MSRFallback.
The host application will re-attempt the transaction. To invoke this use case, here are the following pre-
requisites.
Pre-requisites:

Device already configured for Device-Driven Fallback = Disabled.

A card to cause the fallback. Example but not limited to a card with no applications programmed or a
card with an application not configured on the device.
Scheme:

Host begins an initial transaction with PaymentMethod set to MSR+Chip+Contactless.

Device responds with fail and with status of MSRFallback.

Host displays a message to use magstripe.

Host starts a transaction with PaymentMethod set to MSR.

Device may respond with transaction canceled card read error.

Host displays a message each time the transaction fails until successful or until Host decides to end
the transaction.

Device sends the transaction result.
MagTek Universal SDK| For MMS Devices | Programmer's Manual ( Java )
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