Access Control Readers, be it Fingerprint, PIN or RFID Card devices, all have the common authentication criteria; i.e. to validate a user's presented access token and grant the access if the token has been pre-registered. Access Tokens can be Biometrical (Fingerprint or Iris), Physical (Proximity Card) or Logical (PIN or User ID/Password pair) Objects. Users who present a valid access token are regarded as a registered user. In this respect, only biometric authentication is the only secure method to validate if a user possessing the access token is a rightful owner. In the absence of other access restriction, registered users are granted with access by default. However, if a user ID is flagged as 'Disabled' via software application, the access is permanently barred until the status is reinstated. The Reader denies access with 'Disabled User' screen display if a disabled user attempts to gain access.

Fingerprint Reader provides 'Access Options' configuration for setting up Time Zone (TZ) and Access Combination (Access Comb) features. Each TZ defines daily access time slot, 7-day week. Multiple or maximum three time zones can be grouped as one Time Zone Group (TZG) to allow few access time slots per day. There are total 50 TZ and 5 TZG supported per Reader.

When defining the TZ, the range of time specified can result in three possible actions by Reader:

For ease of configuration management, users are assigned with TZG. The effective accessibility is determined by the result of Boolean logical 'OR' of each and every TZ time slot. 

The 'OR' Logical Table

Assuming '1' represents 'access permitted' and '0' is 'deny access', an example below illustrates how the effective access time window can be determined when grouping time zones.  After the fingerprint Reader verifies a registered user's access token, the TZG assigned will be checked. If the access time is outside the permitted time window or not permitted, 'Time Period Deny' message is displayed.

Next Page...