User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 10 – Online transaction messages with DUKPT 2015-04-20
Page248
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message flow:
HOST Direction PIN pad
Message Z2 or Z3


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
Show prompt message
Message Z60


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Message 71
(after customer PIN entered), or
<EOT> when input timed out or
user pressed [CAN]
<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
