A communication apparatus includes a communication control section and an information acquiring communication control section. When the communication apparatus serving as a destination causes an error requiring repair, the destination communication apparatus determines a processing executable time from an estimated repair period indicated by a maintenance notice acquired by issuing to a maintenance system a maintenance call requesting the repair and sends back to the communication apparatus serving as a source having made a connection request temporal inexecutability information indicating that the destination communication apparatus is temporarily unable to execute a connection processing required by the connection request and containing the processing executable time when the destination communication apparatus becomes able to execute the connection processing.