... External communication: CAN ,Ethernet ,GPRS , CDMA5.2 Smart Card Reader: Integrated standards-based RFID reader5.3 Keyboard : Standard ... circuit protection or leakage protection). 6.6 with the card, IC card payment methods to support, in accordance with the " ... pile, through the CAN, Ethernet or GPRS / CDMA wireless network user information, device status information uploaded to the backend control ...