Patent ID: 8599030

Claim:
A communication apparatus comprising: a communication connector to which a communication plug is capable of being connected; a communication section configured to control communication performed through the communication connector; a connection section configured to connect the communication connector and the communication section; a state detector in communication with the connection section and configured to generate a state detection signal corresponding to a connection state of the communication plug relative to the communication connector; a controller in communication with the state detector and configured to determine which of a normal connection state, an improper connection state and a non-connection state the communication plug is in based on the state detection signal, and configured to control an ON-OFF operation of the connection section, wherein when the communication apparatus is initially powered on, the controller and the state detector are turned on, and the controller turns off the connection section, and wherein the controller turns on the connection section after the controller determines that the communication plug is in the normal connection state; and a warning section in communication with the controller and configured to notify a user of results determined by the controller.