SpeedFace-V5L Series User Manual
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Anti-passback Setup
A user may be followed by some person(s) to enter the door without verification, resulting in a security
breach. So, to avoid such situations, the Anti-Passback option was developed. Once it is enabled, the
check-in and check-out record must occur alternatively to open the door to represent a consistent pattern.
This function requires two devices to work together:
One device is installed on the indoor side of the door (master device), and the other one is installed on the
outdoor side of the door (the slave device). The two devices communicate via the Wiegand signal. The
Wiegand format and Output type (User ID / Card Number) adopted by the master device and slave device
must be consistent.
Tap Anti-Passback Setup on the Access Control interface.
Function Description
Function Name Description
Anti-passback
Direction
No Anti-Passback: The Anti-
Passback function is disabled, which means
successful verification through either the master device or slave device can
unlock the door. The attendance state is not saved in this option.
Out Anti-Passback: The user can check-out only if the last record is a check-in
record otherwise an alarm is raised. However, the user can check-in freely.
In Anti-Passback: The user can check-
in again only if the last record is a
check-out record otherwise an alarm is raised. However, the user can check-
out freely.
In/Out Anti-Passback: In this case, a user can check-in only if the last record is
a check-out or the user can check-out only if the last record is a check-in
otherwise the alarm is triggered.
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