... unlocking combination function, easy integration with door lock system. 4. Communications Versatile interface options including RS232/485 ... TCP/IP, USB-hostStandard FunctionsWorkcode, SMS, DLST, Scheduled-bell, Self-Service Query, Automatic Status Switch, T9 input ... Interface forLock, door sensor, exit button, alarm, Door Bell, Anti-pass backWiegand SignalInput & OutputOptional FunctionsID/ Mifare /HID ...