Introduction

Tailgating is a term used to describe when one user enters a zone, and several people follow him or her inside a zone without verification. Antipassback feature can be implemented in FingerTec?readers to help alleviate tailgating problem; by tracking the location of a particular user whether he is inside or outside a secured area.

When antipassback feature is enabled by manual setting on the R2 reader, a user must be verified at a designated 'IN' FingerTec?reader, followed by a verification at a designated 'OUT' FingerTec?reader, before it can be used to read 'IN' again. In an event where a user is not verified at an 'IN' reader, and he leaves the zone, an anti-passback violation occurs. The violation may just log the event to not allow the door to be released even when the verification is successful. Thus, users who fail to verify their identities and walk in without getting verified may get stranded or locked in. Installations of FingerTec?readers on each side of the door are required for the implementation of antipassback feature.

Benefits

• Preventing card holders from passing his or her RFID card to others;
• Avoiding tailgating and ensuring all users are authenticated using the registered cards or fingerprints
• Enforcing attendance-taking process when the R2 reader is also used for time and attendance clocking machine. Users are required to flash the card or scan his/her fingerprint at IN and OUT readers when entering or leaving the access area so that their access will not be blocked by "antipassback violation".

Implementation

• Both R2 and R2i readers are inter-connected with a special cable for linking R2i reader's weigand-out port to R2 reader's weigand-in port. The cable serves as a communication link as well as 12V DC power input to R2i reader. R2 acts as a master reader which performs fingerprint and card verification and door release function;
• R2i equipped with RFID Card reader and Fingerprint scanner. It acts as a slave reader which forward the fingerprint and card ID to master reader for verification. All user registration details, such as User IDs, Fingerprint Templates, and Card IDs are stored in the R2 reader.
• R2 and R2i are communicated using weigand 26-bit protocol.

There are two models of R2 Readers. R2 Main Controller Board (MCU) with 7-pin interface port for inter-reader communication using 26-bit wiegand protocol supports R2-to-R2 antipassback access control implementation. R2 with 11-pin port on MCU can connect with R2i Slave Reader. The interface cable also enables R2i to power up with directly 12V DC current supply from R2 master Reader.