A wireless transceiver comprises a digital to analog converter having an input for receiving a digital representation of a direct sequence spread spectrum signal and having an analog output. The second NFC signal modifies a setting andor initiates a function of the wireless terminal. Source followers are respectively connected in parallel with the first driver MOSFET and the second driver MOSFET for creating a low common mode loading impedance on the conductors during times when the main driver MOSFETs are turning on and turning off to greatly reduce any common mode fluctuations caused by the main driver MOSFETs. The refrigeration cabinet also has an insulated main chamber, in which air is cooled by the evaporator assembly. Output of the current availability status is controlled, such that the requester of the particular communication request is notified of an availability of the user to respond to the particular communication request.