GMT Offset is a three-digit field containing the GMT offset used for authorization functions. The GMT offset provides the difference of the local time zone as compared to the GMT. The first-digit position represents the time difference and the offset increment from the GMT. The second and third-digit positions represent the magnitude of the time difference.
The system validates that the GMT corresponds with the format noted in the following table.
Code |
First Digit Position |
0 |
Positive, Local time ahead of GMT, offset in hours |
1 |
Negative, Local time behind GMT, offset in hours |
2 |
Positive, offset in 15 min. increments |
3 |
Negative, offset in 15 min. increments |
4 |
Positive, offset in 15 min. increments, participating in daylight savings time |
5 |
Negative, offset in 15 min. increments, participating in daylight savings time |
6-9 |
Invalid codes |
For positions 2-3, magnitude must be:
Possible Causes |
Solutions |
Incorrect GMT offset in the download file. |
|
The terminal data for this field may be corrupt. |
Verify the GMT offset in the terminal.
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