Access Control Installation and Operation
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3.4.5 Anti-Passback Feature
The anti-passback feature prevents users from giving access to others by “passing back” their
access cards. In a typical anti-passback installation, users must “register” themselves by
accessing a door programmed as Entry when they enter the building. They will only be
allowed to leave from a door programmed as Exit. A user cannot access an Entry door twice
consecutively. The menu allows users to be “forgiven” (allowed access even if
they have not exited properly) and provides other anti-passback options. See Section 3.4.6.
Figure 3-8 below shows an example of anti-passback application. In this example, employees
enter through an anti-passback doors (must enter and exit through separate doors). The man-
ager’s entrance is not an anti-passback door, allowing employees to come and go freely.
Note: The anti-passback feature must be enabled through programming. See Section 6.
Figure 3-8 Sample Anti-Passback Application
DOOR ENTR
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