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DISPLAY MODULE AND OFFICE CONFIGURATION EDITOR
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3-140
SIG-00-22-02 JUNE 2022 (Revised September 2022)
Version: B.1
3.7
Configuration Check Number (CCN) and the Office CCN (OCCN)
The software used in the GCP5000 generates a 32-bit Cyclical Redundancy Check (CRC)
number to determine that the software data has not been corrupted. Corrupted data would
display a different CRC value. The GCP5000 takes the CRC of all configuration data and
derives a Configuration Check Number (CCN) from that. Since there are values that are set in
the field, the software derives an Office Configuration Check Number (OCCN), which is the 32-
bit CRC of the configuration data, excluding items that are protected by the Field Password.
3.7.1 Parameters Excluded From OCCN
The following values have been excluded from OCCN and are covered by the Field Password:
Table 3-11: Field Password Values
PSO RX 1 Freq Category
PSO RX 2 Freq Category
PSO Island Freq Category
PSO TX Level
PSO RX1 Threshold
PSO RX2 Threshold
SSCC 1 / 2 Low Battery Detection
SSCC 1 / 2 Low Battery Level
SSCC 1 / 2 Lamp Neutral Test