User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06

Section 7 – Contactless EMV Level 2 transaction messages 2015-04-20

Page143

Uniform Industrial Corp. Proprietary and Confidential Total 342 pages

Message T65 Get Online authorization Data

Format: <STX>T65[Data type][control]<ETX>[LRC]

Message length: Variable 7 to 8 bytes.

Usage: Issue this message to get data (EMV) for online authorization.

Message element:

Field Length Value and description

T65 3 Message ID

[Data type] 1 0 : Data record

1 : Discretionary data

[control] 1 (optional)

'0': Ready for next packet, [Data

type] is ignored.

[LRC] 1 Checksum

While the EMV transaction must be authorized online, terminal shall issue message T65 to get the

necessary data for online authorization from PIN pad. And PIN pad will wait terminal to send one

message T71 to tell the PIN pad the go online authorization result

PIN pad will search the corresponding values according to this tag list and return it at message T66 after

receive message T65 from terminal. Please refer to Appendix G for more details.

Message flow:

HOST Direction PIN Pad

Message T65





<ACK> (Good LRC)

<NAK> (Bad LRC)

<EOT> (after 3 NAKs)



Message T66

<ACK> (Good LRC)

<NAK> (Bad LRC)

<EOT> (after 3 NAKs)

