Tyco Safety Products / Software House PI26 User Manual
apC/8X Event and Card Storage
2-6
apC/8X Technical Manual
apC/8X Event and Card Storage
Event storage space in the apC/8X memory is automatically adjusted
according to the space required for storing cardholder information. Increasing
the number of stored records decreases the number of events (transactions)
that the memory can hold. Adding optional software features, such as elevator
control (10 bytes), anti-passback (4 bytes) activation and expiration dates (4
bytes each), and 32-bit card records reduces cardholder counts and event
storage space.
according to the space required for storing cardholder information. Increasing
the number of stored records decreases the number of events (transactions)
that the memory can hold. Adding optional software features, such as elevator
control (10 bytes), anti-passback (4 bytes) activation and expiration dates (4
bytes each), and 32-bit card records reduces cardholder counts and event
storage space.
Calculating Number of Cards Supported in Memory
Use the following formula to estimate the number of cards that can be
supported for a given memory size.
supported for a given memory size.
where:
memory size is the total apC/8X RAM in kilobytes.
Card_record_size is the number of bytes comprising a record. A typical
card_record_size for C•CURE 800/8000 system can be estimated as follows:
card_record_size for C•CURE 800/8000 system can be estimated as follows:
Events are the average number of events that an apC/8X must store between
uploads to the host. A typical value is 1000.
uploads to the host. A typical value is 1000.
number of cards = (memory size - 64) x (1024 - (events x 10))
card_record_size
Table 2.3: Card_Record_Size Estimate
Item
Bytes
Card number
4
Issue + PIN
4
Activation date
4
Expiration date
4
Clearances
10
Total
26