When my company intended to use biometric system I am lucky to a part of that.
The hardware is basically that a “Controller” which has a fixed static IP address which is connect a lan cable to the server computer. And the computer also has a fixed IP address. The connection is made thru vb and sql server for template of employees name etc. Another database oracle 10g is used for web server for viewing their status. This is the scenario. The controller is supplied by a vendor called “SMART” and they r the responsible for all of that.
Hope it helps u !