According to one embodiment, a server apparatus includes a memory which stores a control table respectively showing correspondence relations between user ID of the first data terminal and listener information indicating that the first data terminal is in operation in a pseudo manner, when the first data terminal contained in the call information event is out of operation, and a controller which refers the control table based on the user ID of the first data terminal, when the first data terminal which is out of operation is started, and establishes a communication connection between the first data terminal and the second data terminal based on a reference result.