Picture Perfect 4.6 User Manual - UTCFS Global Security Products

170
Picture Perfect 4.6
User Manual
Here are the transactions in order with resulting current area after each:
Table 77. Anti-passback example transactions
Person/Badge
Last Access
Area
Transaction
Person/
Badge
Current
Area
Controller 1
Person Area
(Host Broadcast
to Controllers)
Controller 2
Person Area
(Host
Broadcast to
Controllers)
Controller 1
Person Area
(Controller
Requests
from Host)
Controller 2
Person Area
(Controller
Requests from
Host)
Neutral Initial State Neutral Neutral Neutral Neutral Neutral
Neutral
Area A
Area B
Area C
Badge at
Reader 1,
enters Area A
Badge at
Reader 3,
enters Area B
Badge at
Reader 5,
enters Area C
Badge at
Reader 7,
enters Area A
Area A Area A Area A Area A Neutral
Area B Area B Area B Area A Area B
Area C Area C Area C Area A Area C
Area A Area A Area A Area A Area C
Nested APB Configurations
The following APB configurations are supported:
Global Nested APB - Host Broadcasts to Controllers
The current area status of a badge is synchronized across all relevant controllers on a server (for
example, in an Enterprise system at a subhost, but not to the nethost or other subhost controllers).
On all valid APB legacy and nested transactions (VALID_APB_IN, VALID_APB_OUT,
PASSIVE_APB_IN, PASSIVE_APB_OUT, VALID_NESTED_APB, PASSIVE_NESTED_APB,
FAIL_SAFE) that occur, all controllers (except dial-up) that know the badge and have at least one
Host Broadcasts to Controllers type, Global Nested APB reader are notified of the Current Area of
the badge.
Global Nested APB - Controller Requests from Host
When Global Nested APB is configured to Controller Requests from Host, every controller requests
the “Current Area” for the person the badge belongs to (since the person's current area may have
been set from a different badge on that person) from the host for each nested APB transaction that is
about to occur before evaluating access, when the badge is presented to a reader.
This approach has the least overhead at the host, but incurs longer wait times on badge learn
transactions at a Nested APB reader.