608 analog intercom system communicates via CAT-5e cable and can realize long-range transmission. 608D-A9 outdoor station is equipped with a numeric keypad and LED digital tube display. It’s typically applicable for high-rise residential building or building complex.
Small outdoor station 608SD-C3 is an analogue intercom based on 485 communication protocol. It can come with one call button, call button with card reader or keypad. C3C stands for card reader. The residents can unlock the door by IC/ID cards.