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
Page258
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message flow:
HOST Direction PIN Pad
Message 94


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Message 91
<ACK>/<NAK>/<EOT>
