VeriFone MX800 Series - MS Packet 08: Select a Master Key

IPP MS AND DUKPT COMMUNICATIONS PACKETS
MS-Specific Packets
322 M
X
800 SERIES PROGRAMMERS GUIDE
MS Packet 08:
Select a Master Key
The master device sends this packet to the IPP to select one of the ten possible
master keys (0–9). It is recommended that the master device should always send
this packet first before sending a packet (for example, Packet Z60: Accept and
Encrypt PIN (VISA Mode)) to request for PIN entry.
MS Packet 08 Length:
• MAX: 6 characters
• MIN: 6 characters
MS Packet 08
Example:
To select Master Key 7:
<SI>087<SO>{LRC}
Table 61 Response Packet 04 GISKE Block Format Communication
Protocol
Master Device
Transmit
Direction
IPP
<SI>04[a]<SO>{LRC}
• ACK if LRC okay
• NAK if LRC incorrect
• EOT after 3 NAKs
• PIN pad checks requested address [a].
<SI>04[r][KUA][MOUA][MACMA][KV][KL]<SO>{L
RC}
• ACK if LRC okay
• NAK if LRC incorrect
• EOT after 3 NAKs
EOT
Table 62 MS Packet 08 Format
Data Element Characteristic Comments
<SI> 1H Shift In, Value: 0Fh
Packet Type 2AN Value: 08
[a] 1N Master Key address: 0–9
<SO> 1H Shift Out, Value: 0Eh
{LRC} 1H Error Check