Support for custom facility code for 37bit proximity cards is required to allow Mayr-Melnhof Packaging UK Ltd to use their existing card stock on the T1488, T8526, T3200 products. At present, the firmware in the T8526/T3200 does not support the custom facility code of 0×5000 and will not decode the cards. This facility code of 0×5000 was determined from the sample card received.