User's Manual

Table Of Contents

4-inch Visible Light Terminal

User Manual

Anti-passback Setup 10.5

It is possible that users may be followed by some persons to enter the door without verification, resulting

in a security breach. So, to avoid such a situation, the Anti-Passback option was developed. Once it is

enabled, the check-in record must match with the check-out record so as to open the door.

This function requires two devices to work together: one is installed inside the door (master device), and

the other one is installed outside the door (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: 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: After a user checks out, only if the last record is a check-in

record, the user can check-out again; otherwise, the alarm will be triggered.

However, the user can check-in freely.

In Anti-passback: After a user checks in, only if the last record is a check-out

record, the user can check-

in again; otherwise, the alarm will be triggered.

However, the user can check-out freely.

In/Out Anti-passback:

After a user checks in/out, only if the last record is a

check-out record, the user can check-in again; or if it is a check-in record, the

user can check-out again; otherwise, the alarm will be triggered.