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IPAC Server Administrator's Manual
To view the details for a specific card format:
1. Scroll over the Configuration link. The sub-navigation menu displays.
2. From the Cards link, click Card Formats from the dropdown list. The Card
Formats list displays.
3. Click the card format you want to view. The corresponding Card Format page
displays.
Details displayed may include some of the following:
Bit Length. The length, in bit size, of the card format.
Encoding. The style of encoding used on the card format.
Card Number. The internal value that uniquely identifies the card.
Facility Code. An internal value set at manufacturing to differentiate cards with the same
external value.
Agency Code. Some card formats have a hardwired set of bits unique to the card vendor,
while other formats use an additional data field, depending on the format.
Parity bit. Simple parity bit calculations are a common way to ensure the accuracy of the
card read. This field provides space to inform the card engine how to calculate a single
parity bit.
Bit Mask. In some cases certain bits within a card should be ignored. Specifying a mask
allows bits to be dropped out of incoming credentials of the same length as this format
before being matched to the set of defined cards. Note that this causes a loss of information
in creating card credentials, and should only be used if you fully understand the
implications.
.
Preset Value
Certain card formats that contain a "vendor bits" field or similar hardwired
value that is present no matter what other fields exist on the card. This allows you to enter
a template for values that will always be inserted into a card when encoded.
Administrators with appropriate permissions can:
Click Back to List to return to the Card Formats list.
162
View Card Format Details
Figure 84.
Page 162 of 334
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