Pro Tripod Turnstile TCP/IP network communication: the communication data is specially encrypted to relieve the concern of privacy leak. Barrier open/closed, free accessing, forbidden mode are selectable. Bidirectional (entering/exiting) lane Remote control and management LED indicates the entrance/exit and passing status. Fire alarm passing: when the fire alarm is triggered, the barrier will be dropped automatically for emergency evacuation. Valid passing duration settings: system will cancel the passing permission if a person does not pass through the lane within the valid passing duration.