COMMUNICATION DEVICE, METHOD AND SYSTEM

摘要

Embodiments of the present invention disclose a communication device, and further provide a corresponding communication method. In the communication device, a control unit is configured to instruct a universal input interface to refuse to receive information when a universal output interface sends information; and instruct the universal output interface to maintain a closed state when the universal input interface receives information or when the universal output interface does not send information; the universal output interface is configured to maintain the closed state according to the instruction of the control unit when not sending information or when the universal input interface receives information; and the universal input interface is configured to refuse to receive information according to the instruction of the control unit when the universal output interface sends information. According to the communication device of the embodiments of the present invention, no external extended component is added; the structure of the communication device is simple, and line reliability of the communication device is not affected.