User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 6 – Contact EMV Level 2 transaction messages 2015-04-20
Page108
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message flow:
HOST Direction PIN pad
Message T25


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Message T26 (T262)
<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Message T25


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Message T26 (T262)
<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

… … …
Message T25


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Message T26 (T261)
<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

PIN pad erases batch data.