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This one-character field is used to identify the device type of the merchant submitting the authorization request. The following table lists device codes:
Code |
Device Type |
O |
Unknown or unsure |
C |
PC |
D |
Dial terminal |
E |
Electronic cash register |
I |
In-store promotion |
M |
Mainframe |
P |
POS-port |
Q |
Reserved for third-party developers |
R |
POS-port |
S |
POS-partner |
Z |
Suppress PS2000/Merit response fields |