f) Portable Card Reader (CRD)
The Portable Card Reader or CRD is provided for each station and will be utilized as a
mobile gate to provide more efficient service to the passenger which allows authorized staff
to perform analysis of Contactless Smart Cards (CSCs) and Contactless Smart Tokens
(CSTs) which are used in the MRTA Purple Line AFC system. The Portable CRD is also able
to emulate the operation of the stations entry and exit Automatic Gates (AG). In the AG mode
the Portable CRD processes the presented CSC/CST identically to the physical AG and
indicates using sound and visually on the built in LCD screen and LEDs, valid or invalid for
passage.