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1 Introduction to the fingerprint solution
A fingerprint sensor is integrated with the time terminal. The fingerprint
sensor is used for enrolling user’s fingerprints, storing fingerprint
templates and for identifying users.
No images of the fingerprints are stored. Instead, a data model (a set of
data points) of the fingerprint, called a fingerprint template, is stored
locally on the fingerprint sensor in the terminal.
2. Operating modes
The fingerprint sensor has two main operating modes; Identify mode and
Enrol mode.
Identify mode isthe normal mode which also isentered automatically after
start-up of the terminal.
How to enter Enrol mode is described below. It is important to note that a
short time after the enrolment process has been completed, the
fingerprint sensor automatically changes to Identify mode.
3. Identification mode
Identify mode is the normal mode of the terminal. It means that the
fingerprint sensor is ready to scan any finger index that is placed on the
fingerprint sensor.
The scan starts automatically when a finger has been detected by the
sensor. The scanned fingerprint will be compared with all stored
fingerprint templates on the fingerprint sensor. If a matching template is
found the Global ID value for the user will be sent to the application
running in the terminal. The Global ID value is a unique identifier for the
user that the Time & Attendance (T&A) system is aware of. As an
example, there are T&A systems that may use the users Badge number
as Global ID value.