VeriFone MX800 Series - Packet 11: PIN Pad Connection Test; Packets 7 and 12: Dummy Packets

IPP MS AND DUKPT COMMUNICATIONS PACKETS
Common Packets
296 M
X
800 SERIES PROGRAMMERS GUIDE
Packet 11: PIN Pad
Connection Test
The master device uses this packet to check the connection with the IPP. If the
connection is good, the master device receives an ‘ACK’ from the IPP within one
second. Else, it assumes that the IPP is not connected.
Packet 11 Length:
• MAX: 5 characters
• MIN: 5 characters
Sample Packet
<SI>11<SO>{LRC}
Packets 7 and 12:
Dummy Packets
Packets 7 and 12 are dummy packets. When the IPP receives these packets it
sends out only <ACK> within one second.
10 Clear IPP
<SI>0110<SO>{LRC}
IPP7
ACK/NAK/EOT
<SI>14CLR COMPLETE<SO>{LRC}
ACK/NAK/EOT
EOT to terminate process.
Table 35 Packets 09 and 14 Communication Protocol (Continued)
Master Device
Transmit
Direction
IPP
Table 36 Packet 11 Format
Data Element Characteristic Comments
<SI> 1H Shift in, value: 0Fh
Packet Type 2AN Value: 11
<SO> 1H Shift out, value: 0Eh
{LRC} 1H Error check
Table 37 Packet 11 Communication Protocol
Master Device
Transmit
Direction
IPP
<SI>11<SO>{LRC}
• ACK if LRC
• NAK if LRC incorrect
• EOT after 3 NAKs