... TCP/IP 1,2,4 Door Access Control System fits any type of installations, up to ... Y.Link-01/02/04 Series Access Control System and Time Attendance With TCP/IP Interface provide ... Structure or called ‘Browser Server’ Mode) programs the system within a few minutes, from a non-dedicated PC ... . Each controller works independently and keeps its own database.Visual LEDS (Four lights: Red, Green, Blue, Orange) ...