User Manual

Table Of Contents
66
Chapter 6 Anti-Passback
The Anti-Passback is used to ensure one-card and one-way access into and then out of a
controlled area. This function prevents users from passing their cards back to a second
person to gain entry into the same controlled area. Depending on the number of controllers
and communication link, there are three types of Anti-Passback operations: Anti-Passback,
Local Anti-Passback and Global Anti-Passback.
Anti-Passback is performed only on one controller, while Local Anti-Passback and Global
Anti-Passback can be performed on multiple controllers. Anti-Passback is performed through
either RS-485 or TCP/IP connection, while Local Anti-Passback and Global Anti-Passback
are performed only through TCP/IP connection. The following table lists the supported
operations among GV-AS / GV-EV Controllers.
Model Anti-Passback Local Anti-Passback & Global
Anti-Passback
GV-AS100 / 110 / 120 Yes
Yes (GV-ASBox or GV-ASNet
required)
GV-AS1010 / 1110
GV-AS210 / 410 / 810
GV-AS2110 / 2120 / 4110 / 8110
Yes Yes