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
Page92
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
<SUB> 1 <1A>
[Force Online]
1 1: Force Online
<SUB> 1 <1A>
[Encrypted
Session key]
16 or
32
(Optional, if the transaction needs user
to enter password for online authorized
and not session key exists, PIN pad
will ignore the password input and
indicate that no password is entered)
DES session key / TDES session key
used for EMV online PIN entry.
<ETX> 1 <03>
[LRC] 1 Checksum
Message flow:
HOST Direction PIN pad
Message T15


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Start Transaction Response.
Message T16
<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
